30 Sep
2002
30 Sep
'02
22:40
* Ronald Wiplinger (ronald@elmit.com) [020930 15:36]:
What is it, why is it so?
They're checking whether they can get bounces back to you and, if not, they'll reject your mail. It looks like your mail server rejects mail with a null sender--this is a very bad thing to do and will land your domain in blacklists such the ones run by rfc-ignorant.org. -- -ckm