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• Exchange 2007 Email Error 451 4.7.0 Timeout waiting for client input

  - by HK1

  Our SBS 2008 server with Exchange 2007 started rejecting some (most) emails starting about 3 or 4 days ago. The return failure message looks something like this: The error that the other server returned was: 451 451 4.7.0 Timeout waiting for client input (state 18) I've rebooted our Sonicwall TZ-210 router and that doesn't make any difference. I think this problem has something to do with MTU (packet size) but I don't understand why the problem just started now. We haven't made any changes to our network infrastructure for weeks. If I ping our SonicWall (DSL connection, bridge mode) forcing unfragmented packets, I start getting packet dropouts at packet size 1320 or so. Maybe this is completely normal, I'm not sure. I haven't tried rebooting the DSL modem yet because I'm not on site. That's one of the next things I'll try.

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• Email deliverability -- Whitelist solution or Email delivery service?

  - by JoefrshnJoeclean

  Hey Folks -- our company is encountering the same recurring problem - email deliverability. A lot of our emails are still getting trapped in yahoo and gmail spam filters. We followed yahoo's best practices guide as well as tips Ive found on serverfault. (setting up DKIM, SPF) And even took the Email Server Test (http://www.allaboutspam.com/email-server-test/) Now my question is: has anyone had success using whitelist solutions like goodmail or EmailReach? Alternatively, Im beginning to think that going with a email delivery service like Mailchimp will save me the headache and future stress of managing our email lists. So whitelist solution or just fork up the money and send via an email delivery service? Thanks!

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• Postfix, limit destination concurrency

  - by Hamlet

  Hi, Website sending email using phpmailer - Centos, postfix, php, mysql etc Emails are getting delivered to all hosts correctly except one. Mar 30 14:38:22 server postfix/qmgr[15467]: 7237D218852D: to=, relay=none, delay=0.04, delays=0.04/0.01/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with mail06.indamail.hu[91.83.45.46] while sending MAIL FROM) They told me to limit concurrent connections to 2 to their server. I did, but they still say I connect more than twice. main.cf: default_destination_concurrency_limit = 1 fallback_relay = smtp_destination_concurrency_limit = 1 initial_destination_concurrency = 1 Any ideas? Thanks, Hamlet

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• Confused about SPF Record setup

  - by Ramon A.

  Hello, I'm confused on how I should set up SPF records for my multiple domains. Here is my configuration: the setup is: (a) domain1.com points to server1 (b) mail.domain1.com points to server2 (c) domain2.com is a vhost in server1 (d) domain3.com is a vhost in server1 (e) and so on.. I want the SPF record to be set up so that domain1.com, domain2.com, domain3.com are authorized to send emails using mail.domain1.com. I'm confused on wether to put the SPF record on each domain, or on the main server only.

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• Exchange ActiveSync with multiple email addresses

  - by Martin Robins

  I have Exchange 2007 SP2, and I have successfully connected my Windows Mobile phone via Exchange ActiveSync and can send and receive emails. I have two addresses within my Exchange mailbox, [email protected] and [email protected], with the second being set as the reply address. When I view my email addresses on my device, I see both of these email addresses, however when I send new messages it always selects the first email address as the reply address and not the second. It is probably worth pointing out that, like in the example provided above, the email addresses are shown alphabetically and the address being selected is the first alphabetically (just in case that matters). I would like to set the device to always select the reply address specified in the mailbox, or at least be able to ensure that the address I want is selected if I have to select it manually on the device, but cannot find any way to make this happen. Can anybody help?

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• Postfix server configuration values explained?

  - by Xeoncross

  I am trying to setup a single server to send out email from a single domain but I'm having trouble identifying the correct values for these Postfix settings. mydomain = example.com myhostname = example.com myorigin = $mydomain mydestination = $example, localhost.$example, localhost relayhost = mynetworks = 127.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all Can someone can explain them so I know what I should be setting them to? Things like $mydomain appear to be added at runtime by the script. This seems to work (emails come from [email protected]) but I am weary of using values for parameters I don't understand.

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• mod_fcgid: stderr: PHP Fatal error with Plesk 11.5.30 and php-pear

  - by netsetter

  Just upgraded to Plesk 11.5.30 and found out that sending SMTP emails with php pear aren't working anymore with following error message: mod_fcgid: stderr: PHP Fatal error: require_once(): Failed opening required 'Mail.php' (include_path='.:/usr/share/pear') in /var/www/vhosts/mydomain.com/httpdocs/check.php on line 4 I know in the new Plesk 11.5 they changed the structure of all vhosts, but the strange thing is that require_once('System.php') placed into the same directory and file is working correctly with no errors and is returning bool(true). Any hints where I could have a look with this mod_fcgid error when require_once('System.php') is working but require_once('Mail.php') isn't working?

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• email bouncing back

  - by moiz.in

  Some emails are bouncing back with the error message below The following organization rejected your message: cluster-m.mailcontrol.com Also when I looked the further details it gives me this information: Diagnostic information for administrators: Generating server: myserver.com.au [email protected] cluster-m.mailcontrol.com #554 5.7.1 Access denied ## Received: from myserver.com.au ([192.168.0.3]) by myserver.com.au ([192.168.0.3]) with mapi; Mon, 27 Jun 2011 08:04:50 +0800 From: XYZ <[email protected]> To: "XYZ ([email protected])" <[email protected]> Date: Mon, 27 Jun 2011 08:04:49 +0800 Subject: FW: Pic S979888 Thread-Topic: Pic S979888 Thread-Index: Acw0WppDIX2PPJwZR0OGVP1rbUtzDAAAzcuA Message-ID: <[email protected]> Accept-Language: en-US, en-AU Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: acceptlanguage: en-US, en-AU Content-Type: multipart/mixed; boundary="_004_573874A6BF36864EA3FB179BF7A43C2B031D388DF7D8bunsrvapp00_" MIME-Version: 1.0 Could you please tell me what is wrong with this and why is it bouncing back?

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• Can't connect to MySQL server on '127.0.0.1' + Postfix

  - by Andrew Dakin

  I just installed Postfix and configured it to use MySQL. It wasn't sending any emails out after I did that so I checked /var/log/mail.log and it came back with this: postfix/trivial-rewrite[5283]: fatal: proxy:mysql:/etc/postfix/mysql-domains.cf(0,lock|fold_fix): table lookup problem postfix/cleanup[5258]: warning: AFCDC30437: virtual_alias_maps map lookup problem for [email protected] postfix/master[4761]: warning: process /usr/lib/postfix/trivial-rewrite pid 5282 exit status 1 postfix/proxymap[4126]: warning: connect to mysql server 127.0.0.1: Can't connect to MySQL server on '127.0.0.1' (110) In mysql-domains.cf I'm using: Hosts 127.0.0.1 I can connect to MySQL with this: mysql -u postfixuser -p But I can't connect this way: mysql -u postfixuser -h 127.0.0.1 -p maildbname Also when I run netstat -l it comes back with: tcp 0 0 localhost:mysql *:* LISTEN I've tried changing my hosts to: Hosts localhost But then I just get a socket error: postfix/cleanup[4870]: warning: connect to mysql server localhost: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' I also have this set up in the MySQL config file: bind-address = 127.0.0.1 I'm sure I'm missing something obvious, but I am pretty new to all this. Thanks! Andy

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• Forwarding all mail to a single dev box on IIS via virtual SMTP

  - by Greg R

  I am trying to set up a development environment for our web server. I would like all emails that are relayed by the server go to a specific mailbox, regardless of who they were sent to. For example, some application on the server sends an email to [email protected]. I want that email to go to [email protected]. Is that possible to do with IIS/Virtual SMTP? Is there some other way of doing this? I don't have exchange server running, if that makes a difference. Any help would be greatly appreciated. Thanks a lot!

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• Sendmail background process sometimes processes queue, but sendmail -q always works

  - by markmcb

  I'm using sendmail version 8.14.4 on Fedora 15 to send email. My Rails app uses delayed_job to queue up emails. Messages will queue up in /var/spool/mqueue as expected, but don't always get processed. I can see the messages and sendmail is definitely running in the background. Restarting the process does nothing. However, when I issue the sendmail -q command, sendmail gets to work and starts sending. The really odd thing is that this behavior only occurs sometimes. Other times message queue up and are delivered as expected. I've tried tweaking various sendmail configs to reduce the time between queue processing (for example, adding define('confMIN_QUEUE_AGE', '0')dnl to /etc/mail/sendmail.mc), but nothing seems to do the trick. Any ideas what might be the root cause?

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• Sendmail not working from local PHP when headers not specified

  - by Dan

  Hi. I'm having trouble getting my local XAMPP server to send emails via my remote SMTP server. In PHP, if I put: $headers = "From: [email protected]\r\n"; mail('[email protected]', 'test', '', $headers); Then this works. However, if I don't specify the header, ie.: mail('[email protected]', 'test', ''); Then this fails. The sendmail.log file says: smtpstatus=554 smtpmsg='554 Message refused.' errormsg='the server did not accept the mail' exitcode=EX_UNAVAILABLE I've tried changing my sendmail command in my php.ini to: sendmail_path = "C:/xampp/sendmail/sendmail.exe -t -f [email protected]" but this doesn't work either. Thanks for any help with this, Dan. ps. this is on windows.

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• AutoComplete not working in Outlook 2007

  - by studiohack23

  When I go to create a new message in Outlook 2007, and I start typing the first few characters of a contact's name, no suggestions appear. I've just added all my contacts from a .csv file that was exported from Yahoo! Mail. If I type the name out, then click 'send', then it will ask me which of the contact's emails to send it to if the contact has multiple addresses. I've looked in the advanced options to make sure AutoComplete is on, which it its. What is going on? Thanks!

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• Exchange ActiveSync with muliple email addresses

  - by Martin Robins

  I have Exchange 2007 SP2, and I have successfully connected my Windows Mobile phone via Exchange ActiveSync and can send and receive emails. I have two addresses within my Exchange mailbox, [email protected] and [email protected], with the second being set as the reply address. When I view my email addresses on my device, I see both of these email addresses, however when I send new messages it always selects the first email address as the reply address and not the second. It is probably worth pointing out that, like in the example provided above, the email addresses are shown alphabetically and the address being selected is the first alphabetically (just in case that matters). I would like to set the device to always select the reply address specified in the mailbox, or at least be able to ensure that the address I want is selected if I have to select it manually on the device, but cannot find any way to make this happen. Can anybody help?

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• What sources do spammers use to get email addresses?

  - by Andrew Grimm

  From what sources do email spammers get their addresses? Wikipedia mentions the following: Harvesting email addresses from publicly available sources. This includes web pages (web crawling), usenet posts, mailing list archives, DNS and WHOIS records Guessing email addresses (directory harvest attack) Asking people for their emails for one purpose, such as jokes of the day, and selling the email addresses elsewhere Getting access to people's address books (which Quechup utilized) Scanning an infected computer for email addresses. Are there any other techniques used? Are any of the techniques above now obsolete?

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• IMAP email migration from Apptix to Office 365

  - by npiani

  I am having issues setting up a migration from Apptix to Office 365 of 41 users in my company. I've found a couple guides on the Microsoft website about how to do it (Thank you Google) but I keep coming up with problems. I am trying to set up a mailbox migration through IMAP to get all of my users' emails over to Office 365 before we make the transition over from Apptix. One of the forums suggested using IMAP, since a CSV file can be uploaded to Office 365 and it will check for incoming mail for each user every 24 hours. My problem is that when I do this, I just get errors. The link I got was this: http://help.outlook.com/en-us/140/ms.exch.ecp.emailmigrationstatuslearnmore.aspx#imap I was wondering if anyone has successfully managed this transition. I'm using imap.apptixemail.net as the IMAP server (FQDN) Thank you for the help in advance. Any help or push in the right direction would be amazing

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• Exim forwards not going out through TLS

  - by Blake

  I'm trying to get Exim to use STARTTLS to send emails that are just FORWARDS. I have a server accepting email at example-accepting.com for users. So I want [email protected] to forward all email to [email protected]. If I do this from the command like on example-accepting.com... echo "test" | mail -s "ssl/tls test" [email protected] Success!! Sent via TLS BUT, if I send an email to [email protected] the forward fails, it's NOT being sent via TLS. I've tried both forwarding the email via /etc/aliases and the user .forward file. The email is indeed sent, but NOT via TLS. Why is it when I run "mail" from the command like it's working like it should, but a .forward is not using TLS? Thanks

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• Postfix Not Sending Email to Some Addresses?

  - by Jake

  I'm using Jetpack on Wordpress, and it wasn't working. I was getting the following error: Diagnostic-Code: X-Postfix; unknown user: "jake" --60FD1138CAD.1354039466/example.com Content-Description: Undelivered Message (example.com substituted for our domain) We set up a test mail function, and that wasn't sending either. We changed the email to an outside email and it worked. Any thoughts why it won't send to an email that is at the same domain? Or why it sends to some emails but not others? Upon running postconf -n, I get the following: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all inet_protocols = all mailbox_size_limit = 0 mydestination = example.com, Example, localhost.localdomain, localhost myhostname = example.com mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes

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• Email etiquette checker?

  - by Benjamin Oakes

  Sometimes, in the heat of getting a lot of things done, I don't read emails I send as closely as I should. Is there an automated way to pop up warnings before a potentially-unpolite email is sent? I'm thinking about something that would say "wait, why don't you have a 'please' or 'would you' in that message?" I'm using Thunderbird 2 on Ubuntu 9.04. I may be willing to switch email clients if another program offers this. Thanks for your help!

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• What's the largest message size modern email systems generally support?

  - by Phil Hollenback

  I know that Yahoo and Google mail support 25MB email attachments. I have an idea from somewhere that 10MB email messages are generally supported by modern email systems. So if I'm sending an email between two arbitrary users on the internet, what's the safe upper bound on message size? 1MB? 10MB? 25MB? I know that one answer is 'don't send big emails, use some sort of drop box'. I'm looking for a guideline if you are limited to only using regular smtp email.

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• Network authentication + roaming home directory - which technology should I look into using?

  - by Brian

  I'm looking into software which provides a user with a single identity across multiple computers. That is, a user should have the same permissions on each computer, and the user should have access to all of his or her files (roaming home directory) on each computer. There seem to be many solutions for this general idea, but I'm trying to determine the best one for me. Here are some details along with requirements: The network of machines are Amazon EC2 instances running Ubuntu. We access the machines with SSH. Some machines on this LAN may have different uses, but I am only discussing machines for a certain use (running a multi-tenancy platform). The system will not necessarily have a constant amount of machines. We may have to permanently or temporarily alter the amount of machines running. This is the the reason why I'm looking into centralized authentication/storage. The implementation of this effect should be a secure one. We're unsure if users will have direct shell access, but their software will potentially be running (under restricted Linux user names, of course) on our systems, which is as good as direct shell access. Let's assume that their software could potentially be malicious for the sake of security. I have heard of several technologies/combinations to achieve my goal, but I'm unsure of the ramifications of each. An older ServerFault post recommended NFS & NIS, though the combination has security problems according to this old article by Symantec. The article suggests moving to NIS+, but, as it is old, this Wikipedia article has cited statements suggesting a trending away from NIS+ by Sun. The recommended replacement is another thing I have heard of... LDAP. It looks like LDAP can be used to save user information in a centralized location on a network. NFS would still need to be used to cover the 'roaming home folder' requirement, but I see references of them being used together. Since the Symantec article pointed out security problems in both NIS and NFS, is there software to replace NFS, or should I heed that article's suggestions for locking it down? I'm tending toward LDAP because another fundamental piece of our architecture, RabbitMQ, has a authentication/authorization plugin for LDAP. RabbitMQ will be accessible in a restricted manner to users on the system, so I would like to tie the security systems together if possible. Kerberos is another secure authentication protocol that I have heard of. I learned a bit about it some years ago in a cryptography class but don't remember much about it. I have seen suggestions online that it can be combined with LDAP in several ways. Is this necessary? What are the security risks of LDAP without Kerberos? I also remember Kerberos being used in another piece of software developed by Carnegie Mellon University... Andrew File System, or AFS. OpenAFS is available for use, though its setup seems a bit complicated. At my university, AFS provides both requirements... I can log in to any machine, and my "AFS folder" is always available (at least when I acquire an AFS token). Along with suggestions for which path I should look into, does anybody have any guides which were particularly helpful? As the bold text pointed out, LDAP looks to be the best choice, but I'm particularly interested in the implementation details (Keberos? NFS?) with respect to security.

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• Configuring and managing Windows web server

  - by Mike C.

  Hello, I run a few websites and I was thinking of paying for a dedicated Windows web server from GoDaddy instead of paying for each site's hosting individually. I know enough about IIS to configure the Host Header and stuff like that, but I'm a little fuzzy about the email portion of the hosting. I have a few questions: Do I need to install an SMTP server on the web server to allow for emails to be sent/received to a website email address? Or is there another approach that I'm unaware of? Are there tools that monitor the amount of bandwidth used by the server? GoDaddy charges for bandwidth and I want to make sure I don't go over. Am I opening a can of worms that I don't really want to open by going the dedicated server route? Things like server updates, security, etc? Thanks!

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• Reverse DNS does not match SMTP banner vs Reverse DNS mismatch

  - by MadBoy

  I have to make decision whether my Reverse DNS should match SMTP banner but Reverse DNS to DNS and vice versa stays different or vice versa. Which one to choose? I have an 2x Exchange 2010 server with one SMTP Sender with TMG 2010. TMG has 2 links connected so that we have 2 separate internet providers. The problem is I have no way to control TMG behavior on which link is used to send emails as it picks it randomly. I have 2 MX records: - mail.test.com which resolves to IP and IP resolves to mail.test.com - mail2.test.com which resolves to IP2 and IP2 resolves to mail.test.com This was done to prevent smtp banner issues but it provides problems with Reverse DNS if the server on the other side is eager enough to do comparison. But I've checked with Google and they also don't have that in perfect condition.

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• Using watch to run a shell script - but the script goes defunct

  - by PHP-Steven

  So I want to keep an eye on my network connectivity so I can make a report for my ISP. (seems like the modem goes out for about 30-60 seconds about once a day) So I copied this handy little script http://www.cyberciti.biz/tips/simple-linux-and-unix-system-monitoring-with-ping-command-and-scripts.html And an running it with watch -n 15 ./ping-test.sh I have been testing it by pulling the plug on my modem. The first time watch runs the script after the network goes out it runs fine (sends some email) and then goes defunct. Once networking is restored the script "finishes" and then watch runs it again. So I'm getting mail for when the network goes down, but not how long it was down for. If I run the script straight from the command line it runs (emails) and then exits. Any ideas why? How can I get the script to keep running once the network is down?

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• Amavis-new whitelist

  - by pigeon

  Hi to the Linux community. I'm coming from a Windows Server background so have mercy. I'm attempting to whitelist some domains and although I know this isn't the best way of doing so its just a one off for a couple of domains so I thought it would be the quickest way of doing so. Current setup: Amavis is used to pass emails off the ClamAV and SpamAssasin, currently I make changes in /etc/amavis/conf.d/50-user, as this will overide other settings. Have created a whitelist file that looks like this: .domaintowhitelist.com .domain2towhitelist.com In the 50-user config file: Have tried variants like this: read_hash(\%whitelist_sender, '/etc/amavis/whitelist'); read_hash(\%virus_lovers, '/etc/amavis/whitelist'); And restarting amavis after making those changes. Am I going about this the wrong way? Any help is appreciated.

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