Email Errors from Spammers
Recently, I have been getting a load of errors from fetchmail of the form:
May 13 19:01:15 ... fetchmail: SMTP error: 501
<email@example.com>: domain literals not
This email is spam.
There are also loads of errors from a small number of senders like:
2010-05-13 15:06:34 SMTP call from localhost ... dropped: too many syntax or
protocol errors (last command was "MAIL
This is also most definitely spam.
To keep chasing these down and attempting to blacklist up front if this can be
done would be a lot of bother. Any other ideas? (Or simply let the logs fill
up with this harmless junk and save spamassassin the bother :-) ??)