[AMaViS-user] timed out after few minutes

[Sasa <sa...@sh...>]

Hi, I have a smtp/pop3 public mail server, this server is in production 
enviroment form 3/4 years nobody problems but from two days I have that 
smtpd not responding and I have this error:

2B85826A5B3   8913 Tue Mar 16 16:41:11  lis...@do... (delivery
temporarily suspended: conversation with 127.0.0.1[127.0.0.1] timed out
while receiving the initial server greeting) xy...@do...

and all mails keep in queue.
Then I must restart postfix and amavis services after of this the mail are
delivered but then after 30 mimutes I have already problem.
I use postfix-2.5.6-1 and amavisd-new 2.2.1 (with maia, spamassasin and
clamv), I have tried to increase "$max_servers" from 2 to 10 but whitout
result, if disables amavis the mail are delivered quickly.

Thanks.

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   Salvatore.