[Dshield] Anyone familier with Lyris MailShield?

[Bob Poortinga]

"Brenden Walker" <BKWalker at drbsystems.com> writes:
 
> I telneted into the Verizon mail server and tested mail sending
> manually.  Turns out that if I have "X-MSMail-Priority: Normal" in the
> headers, it'll give me that message. It will also fail if I put in
> "X-Mailer: DSI_Thread_SMTPClient".  Both after ending the DATA command.
> 
> Easy enough to drop the MSMail-Priority (I never wanted to use it, but
> customers did).  I thought we were being good mail clients by including
> a distinctive X-Mailer line.  The question I have is should we just drop
> X-Mailer entirely?

X-MSMail-Priority is a header added by M$ MUAs such as Outlook.  Many spam
filters frown heavily on its use without the proper, corresponding X-Mailer:
and X-MIMEOLE: headers.  Your best bet is to drop all X-* headers.

-- 
Bob Poortinga  K9SQL
Bloomington, Indiana  US