159875 - Use of sender e-mail address domain for HELO hostname will not always be correct

Status: VERIFIED DUPLICATE of bug 68877

(MailNews Core :: Networking: SMTP, defect)

Description

[Adam Burrows]

Mozilla Mail uses the @isp.com part of the sender e-mail for the fully qualified
domain name sent to an SMTP sevrer during a HELO request.

As such, user Joe Bloggs, with email of [e-mail] would be sending out
emails with a HELO of 'isp.com'.

It is unlikely that this will be a fully qualified domain name that points to
the sender's real IP, and such is likely to violate section 4.1.1.1 of RFC2821:

Received: from user-123.isp.com ([123.123.123.123] helo=isp.com)
        by mail.isp.com with esmtp (Exim 3.35 #1)

Comment 1

[Jo Hermans]

*** This bug has been marked as a duplicate of 68877 ***

Comment 2

[Sheela Ravindran]

vrfy dup