Dominik Ruf writes on 11/10/2003 10:59 AM:
>>and do rfc's allow a mail to be rejected for this reason?
>
>
> No.
>
> | [...]
> | However, the receiver MUST NOT refuse to accept a message, even if
> | the sender's HELO command fails verification.
I take this to mean "don't return 501 at HELO itself, wait till RCPT to
and then 5xx the message"