I contact you about an issue we are facing, currently we are using OTRS 4 with 4 different mailbox on Office 365.
Since the beginning we face time to time an error when we send an email via OTRS in replying to a customer :
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Message: SMTP authentication failed
I got this error now :
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[Wed May 23 11:40:23 2018] -e: Net::SMTP::_SSLified=GLOB(0x7f922a81ec88): Timeout at /opt/otrs//Kernel/System/Email/SMTP.pm line 87
Net::SMTP::_SSLified=GLOB(0x7f922a81ec88)>>> QUIT
[Wed May 23 11:40:53 2018] -e: Net::SMTP::_SSLified=GLOB(0x7f922a81ec88): Timeout at /opt/otrs//Kernel/System/Email/SMTP.pm line 89
ERROR: OTRS-CGI-55 Perl: 5.14.2 OS: linux Time: Wed May 23 11:40:53 2018
Message: SMTP authentication failed: 000! Enable Net::SMTP debug for more info!
I'm currently in touch with Microsoft to get more information about their SMTP logs but I need to find a solution as soon as possible.
solutions I found :
Setup a Office 365 relay to avoid the SMTP authentication
Go in SMTPS but for the moment I can't because OTRS is use 24/7
Can you help me to find another solution ?