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Hi there,

a client of me has a problem with their old installation of Kerio MailServer 5.5.1

Last Thursday all of a sudden, KMS stopped AUTHing itself to its SMTP relay server.

This is a part of a sniffing log from the mail relay side:

T -> [AP]
  220 ESMTP Postfix (Debian/GNU)..
T -> [AP]
T -> [AP] 80000000..250-VRFY..250-ETRN..250-AUTH PLAIN LOGIN..250-AUTH=

<----- AUTH should be here! ------

T -> [AP]
  MAIL FROM:<user<_a.t_>> SIZE=39993..

I already tried restarting KMS, rebooting the machine, activating and deactivating relay-AUTH, SSL etc. but nothing seems to work.

Any suggestions?


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In the KMS debug log, switch on SMTP Client Logging and post the contents here.

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