Re: [exim] 421 Unexpected failure, please try later

On Wed, Mar 08, 2006 at 03:53:31PM -0000, martin.dm.hull@??? wrote:
>
> Some of my users have been getting 421 errors when trying to send email
> from their systems via my servers. None of this is logged by Exim on my
> server. The customers logs are getting something like
>
> SMTP command failed when talking to smtp.xxxxxx.net: <<< RCPT
> TO:<xxxxx@???> >>> 421 Unexpected failure, please try later

I would try and telnet to port 25 on your server to help you out, but
I suspect you've lied about the server name.

> I'm not sure what the 421 means. I had though that it meant that there
> were no available connections left but it appears to be set for other
> reasons too (like AOL use it when rejecting mail because the sending IP
> has been flagged for spamming).
>
> What does it mean?

Have you googled?

> Can I log whenever my server sends this message to connecting hosts?
>
> How do I measure what the current connections are for my server?

Is there a /var/log/exim/reject.log you could look at?

Steven.

--
Abandon the search for Truth; settle for a good fantasy.