Forcing the from address when postfix relays over smtp

Posted by John Whitlock on Server Fault See other posts from Server Fault or by John Whitlock
Published on 2010-06-03T17:10:29Z Indexed on 2010/06/03 17:14 UTC
Read the original article Hit count: 253

Filed under:

postfix

|

hosted-exchange

I'm trying to get email reports from our AWS EC2 instances. We're using Exchange Online (part of Microsoft Online Services). I've setup a user account specifically for SMTP relaying, and I've setup Postfix to meet all the requirements to relay messages through this server. However, Exchange Online's SMTP server will reject messages unless the From address exactly matches the authentication address (the error message is 550 5.7.1 Client does not have permissions to send as this sender).

With careful configuration, I can setup my services to send as this user. But I'm not a huge fan of being careful - I'd rather have postfix force the issue. Is there a way to do this?

© Server Fault or respective owner

Related posts about postfix

postfix: Temporary lookup failure

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have followed the tutorials step by step for installing and configuring postfix https://help.ubuntu.com/community/Postfix https://help.ubuntu.com/community/PostfixBasicSetupHowto I am trying to test the services to whether Temporary lookup failure error telnet localhost 25 250 2.1.0 Ok rcpt to:… >>> More
postfix with mailman

as seen on Server Fault - Search for 'Server Fault'
What should happen is that [email protected] should be delivered to that users inbox on localhost, user@localhost. Thunderbird works fine at reading user@localhost. I'm just using a small portion of postfix-dovecot with Ubuntu mailman. How can I get postfix to recognize the FQDN and deliver… >>> More
saslauthd + PostFix producing password verification and authentication errors

as seen on Server Fault - Search for 'Server Fault'
So I'm trying to setup PostFix while using SASL (Cyrus variety preferred, I was using dovecot earlier but I'm switching from dovecot to courier so I want to use cyrus instead of dovecot) but I seem to be having issues. Here are the errors I'm receiving: ==> mail.log <== Aug 10 05:11:49 crazyinsanoman… >>> More
centos postfix send email problem

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a big problem with postfix. I can receive mail in webmin and outlook but I can't send (only on local I can - user to user). Dovecot is working just fine. Sendmail is disable. Please help me. postfix -n postfix: invalid option -- n postfix: fatal: usage: postfix [-c config_dir] [-Dv]… >>> More
Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend

as seen on Server Fault - Search for 'Server Fault'
So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as… >>> More

Related posts about hosted-exchange

Experience with Microsoft Online Services hosted Exchange

as seen on Server Fault - Search for 'Server Fault'
Has anyone used MS Online Services - Exchange Online in production? I can't find any intelligent reviews about it. MS is theoretically the best company to host their own software, but what about in practice? My users primarily access their email through Outlook on their laptops, so I am not… >>> More
Changing administrator for hosted Exchange account

as seen on Server Fault - Search for 'Server Fault'
We are using a hosted MS Exchange provider, and they claim that our account can only have one administrator. They also claim that they cannot change which login is granted administrator privileges. This means that the user account that was initially created five years ago is the only account that… >>> More
Delay of mail delivery - Hosted exchange provider

as seen on Server Fault - Search for 'Server Fault'
Hi, I recently signed up to a new hosted email provider. When I send mail (from OWA, OR Outlook) there is a delay of up to 3 minutes from when i send the message, to when it's received (in my gmail account for example) I've listed the headers below. Is there anything I can advise my new email host… >>> More
Hosted Kerio Mailserver vs. Hosted Exchange

as seen on Server Fault - Search for 'Server Fault'
Hi all, I'm in the beginning stages of migrating from an internal exchange server (2003) to external hosted services. We don't have a huge user base, less than 100, but we need to support BlackBerries, iPhones, Outlook RPC/HTTP, etc. I really like exchange hosted providers (I've used intermedia… >>> More
Hosted Exchange 2010 Send As

as seen on Server Fault - Search for 'Server Fault'
I have a hosted exchange 2010 and I am trying to setup the Send-As permission. I am following http://technet.microsoft.com/en-us/library/bb676368.aspx which basically describes the commands for achieving this. I have user account aaa and bbb [PS] C:\Windows\system32get-mailbox -organization myorg… >>> More