BenEBoy mail@psychoferret.freeserve.co.uk wrote:
451 4.1.8 Domain of sender address main-admin@lists.alug.org.uk does not resolve - not flushed
You don't say what sendmail and what distribution you're using, so I can't be specific. You probably need to add some setting to accept any emails from localhost without putting it through spam traps like resolving the email address. Alternatively, if you're taking DNS settings from your ISP, restarting sendmail after PPP comes up may make it work for this case, but might not work in general.
Hope that helps,
MJR