I've had couriermlm running for the last couple of years just great,
with no problems at all. Some time in the last couple of weeks, it
has started failing to send to one person.

I get the following error:
courieresmtp: 554 SMTP service not available

This happens for standard messages out from the list, and also in
reply to -help messages. He can send to the list fine (and these
then go out to everyone apart from him).

I can send email to him no problem, it just appears to be email sent
from couriermlm.

Now, email I send is sent via KMail, which goes direct to NTL's
smtp servers. If (as I'm assuming) mlm is using courier's esmtp
server, then presumably there's something my smtp server is doing
differently to NTL's which is causing the failure.

However, I have no idea where to go from here, and what to check
to find out what is going wrong.

I'm running the full Courier mail server suite, with maildrop
and esmtp. All running on SuSE 8.X. I do have my own DNS server,
but I can ping the smtp server that courieresmtpd seems to be
complaining about, so I don't _think_ it is a DNS issue.

Any ideas greatly appreciated, thanks.

-- 
Be seeing you,                          http://www.bifrost.demon.co.uk/
Sam.                                    jabber: [EMAIL PROTECTED]


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