Solution to: Hotmail Senders receiving NDR : “550-Please turn on SMTP Authentication in your mail client…”

Posted by Tony Yustein on Server Fault See other posts from Server Fault or by Tony Yustein
Published on 2012-06-21T14:54:08Z Indexed on 2012/06/21 15:17 UTC
Read the original article Hit count: 159

Filed under:

smtp

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iphone

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mobile

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hotmail

Original question is here original question

I can not answer to that question because the system requires me to have 10 credits, very nice....

This error is based mostly on mobile devices, mostly on iPhones and mostly on mobile networks. This is how much I have narrowed it to.

I believe:

Hotmail checks where your are connecting from

If it is a mobile network
it requires additional security for sending messages
but the default iPhone config does not have this option for hotmail
if the user creates the hotmail account on the iPhone with SMTP AUTH enabled manually it might solve the situation

Cheers, Tony

© Server Fault or respective owner

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