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Today I upgraded Plesk from 10.3.0 to 10.4.4 MU22 and found issue with Avast. After upgraded plesk my clients noticed, that they cannot send emails. And got error in Outlook:
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Server: 'xxxxxxxxxxxxxxx', Protocol: SMTP, Server Response: '421 Cannot establish SSL with SMTP server XXX.XXX.XXX.XXX:465, SSL_connect error 336031996', Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67
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After reading internet forums I found that issue can be with Avast. So I suggested client to disable checking outgoing messages. After that everything goes OK. Messages was sent.
Question: what was changed in server configuration to cause that?
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Server: 'xxxxxxxxxxxxxxx', Protocol: SMTP, Server Response: '421 Cannot establish SSL with SMTP server XXX.XXX.XXX.XXX:465, SSL_connect error 336031996', Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67
----------------------------------------------------------
After reading internet forums I found that issue can be with Avast. So I suggested client to disable checking outgoing messages. After that everything goes OK. Messages was sent.
Question: what was changed in server configuration to cause that?
