From: Trevor Antczak (no email)
Date: Thu Mar 01 2007 - 17:09:27 EST
Hello,
Alright, with the understanding that what I want to do here is a violation
of good policies, I have question. Hereıs the background:
I run a mailserver for my company here (lite3d.com). Weıre a high tech type
place, and most of our users have laptops and high speed networks at home.
Theyıd like to be able to do work from home, but the problem is that most of
them (us really) have Cox highspeed internet, which will not allow you to
hook up to remote mailservers through its network. You have to send all of
your mail through smtp.east.cox.net or it doesnıt leave their network (I
suppose one could set up a mailserver that listens on a non-standard port
and bypass this, but itıs probably not worth the effort). Cox will allow
you to use whatever you want for a ³from² or ³reply-to² header, so at least
one of my users had the bright idea to setup an alternate SMTP in her client
to use the Cox server, but put her business address in the ³from² header.
It works fine UNLESS she tries to send mail to someone local to our domain.
Our mailserver is setup to reject mail that appears to be from lite3d.com
but is not coming from a lite3d.com server. This is a perfectly normal and
common setting, and I ordinarily support it, but itıs causing problems right
now. How do I turn it off in postfix? I remember doing this in sendmail
(actually I remember turning the feature ON, but..) some years ago, but Iım
fairly new to Postfix. Ideally Iıd like it to only accept mail from
smtp.east.cox.net as if it were local (so Iım only subject to a few hundred
thousand spoofers instead of the whole Internet), but I donıt know how much
I can customize these settings. In the long run I think Iıll go to a VPN to
resolve this, but in the mean time, my boss wants people to be able to send
mail from home.
I looked at the archives to see if this one had already come up (Iım sure it
has), but the request doesnıt lend itself to simple search terms and I
failed to find anything. Sorry for the inevitably already asked question.
Thank you,
-- Trevor Antczak Senior Systems Administrator Louisiana Immersive Technology Enterprise (LITE) 537 Cajundome Blvd #115 Lafayette, Louisiana 70506 (337)735-1351 Office (504)453-3410 Cell
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