Undesirable address rewriting by ZMailer (Resend)

[acli@ada.dhs.org (Ambrose LI)]

[Sorry if this is a duplicate; for some reason I think
my original mail didn't get sent properly to the list.]

Hello,

in ZMailer 2.99.56, it seems that when we mail to

   foo@example.com

where the "host example.com" looks like

   example.com is an alias for www.example.com.
   www.example.com has address 10.11.12.13

   (i.e., instead of an MX or A record as expected,
   they have a CNAME instead)

then ZMailer will silently rewrite the envelope
address as

   foo@www.example.com

In some cases, this will cause example.com's mailer
to reject the mail because www.example.com is not
configured to receive mail.

Is this a known behaviour, and is there a way to
disable it? Thanks very much in advance.

Best regards,
Ambrose

-- 
Ambrose LI Cheuk-Wing  <a.c.li@ieee.org>

http://ada.dhs.org/~acli/
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