Nov 15, 2013

Postfix SSL error when sending message in Thunderbird client

This is a repost from my old blog that is no longer available. (May 16th 2012)

I was trying to send an email with Thunderbird client and got SSL TLS error message. I instantly suspected my email server crashed, because I had to force reboot a day ago.

After tailing mail.log this error message appeared:

postfix/smtpd[1834]: warning: TLS library problem: 1834:error:14094417:SSL routines:SSL3_READ_BYTES:sslv3 alert illegal parameter:s3_pkt.c:1093:SSL alert number 47:

When investigating further I found out mail server was fine, the main reason for this error was on guest machine (where thunderbird was installed - windows 7), it was Avast antivirus. Disabling and re-enabling it was the solution.

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