[Dovecot] dovecot sasl with postfix: SASL LOGIN authentication failed: Connection lost to authentication server

[Timo Sirainen]

On 1.5.2012, at 5.28, David Jonas wrote:

> When using dovecot (2.1.5) sasl with postfix (2.8.4) behind nginx smtp
> proxy I am seeing a ton of errors of the form:
..
> Nothing is printed by dovecot in the logs regarding the error. It seems
> that dovecot just hung up on postfix. (side note: no, can't use xclient
> in nginx/postfix. But perhaps soon.)

So nginx hides the client's IP.

> Finally I just disabled penalties with the info from
> 
> http://www.dovecot.org/list/dovecot/2011-December/062631.html
> 
> and that seemed to do it. Is there a better way?

Nope, other than enabling XCLIENT so Dovecot sees the clients' real IPs instead of nginx's.