Did someone turn on 'smtp fixup' or some other protocol inspection or similar on a Cisco router?
/sent from my pad
On Aug 30, 2014, at 17:45, Ross Boylan <ross@???> wrote:
> There was some fiddling with the network around our exim 4.63 (old)
> mailserver, and now I am unable to connect to send mail from
> outside. I can connect from inside. The connection uses TLS to port
> 25 and authentication.
>
> Evolution says "Failed to connect to SMTP server biostat.ucsf.edu in
> secure mode: STARTTLS not supported". Thunderbird, from a different
> location, has a similar problem. In contrast, this message was
> sent via the same server from an inside client (a different exim
> running on my machine inside the firewall).
>
> Connection to the imap server on the same machine has continued
> uninterrupted for all locations.
>
> I can telnet (using telnet-ssh) to port 25 and get a response from
> exim. So the problem is not that port 25 has simply been blocked.
>
> Can anyone suggest what might be going on, or what we might do to
> diagnose this further?
>
> Thanks.
> Ross Boylan
>
> P.S. The network fiddling was done by a different group; I don't know
> any of the details. They are likely to be more responsive if we can
> point to a particular thing they can tweak.
>
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