[Mailman-Users] From Header Changed

Mark Sapiro mark at msapiro.net
Mon Feb 25 02:45:24 CET 2013

On 2/24/2013 12:48 PM, Dennis Putnam wrote:
> It appears that hotmail offers a free relay. Is that a viable alternative?

I tested two more freemail servers, AOL (smtp.aim.com) and Hotmail
(smtp.live.com). Neither of these is viable as a Mailman outbound relay.

AOL refuses to accept the mail unless both the envelope sender and the
From: header address are addresses associated with the authenticating
AOL/AIM account. In addition, AOL's server says this in it's reply to
the connect:

220-mtaout-ma03.r1000.mx.aol.com ESMTP MUA/Third Party Client Interface
220-AOL and its affiliated companies do not
220-authorize the use of its proprietary computers and computer
220-networks to accept, transmit, or distribute unsolicited bulk
220-e-mail sent from the internet.
220-Effective immediately:
220-AOL may no longer accept connections from IP addresses
220 which no reverse-DNS (PTR record) assigned.

If you have an appropriate reverse-DNS, you probably should just be
sending directly and not through a smarthost.

Hotmail is a bit worse than Gmail. It accepts the mail but rewrites both
the envelope sender and the From: including display name to the address
and display name associated with the authenticating Hotmail/Live
Mail/Outlook.com account. This differs from Gmail in that Gmail rewrites
only the address in From: and not the display name.

None of this is surprising to me. I think all large ISPs take similar
measures in an attempt to avoid relaying spam with spoofed senders.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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