Internal Server Error messages nginx proxy POP/IMAP/SMTP

Francis Daly francis at
Fri Mar 13 00:38:35 UTC 2015

On Thu, Mar 12, 2015 at 07:25:09PM -0400, wrote:

>  upstream timed out (110: Connection timed out) while connecting to
> upstream, client:, server:, login:
> "ricardo.carrillo", upstream:

Your client connected to nginx port 143 (for imap). nginx tried to
connect to port 143. nginx got no response.

Your original mail suggested that there was an imap server on, not

> client was rejected: "MAIL FROM: <ricardo.carrillo at>__" while in auth
> state, client:, server:

I do not know about this part.

The code seems to suggest that that means that one part of the system
expects authentication but another part does not.

What is the response to the manual auth_http request in this case?

Francis Daly        francis at

More information about the nginx mailing list