I want to subscribe a fax number to a (private) Google Group mailing list, so each message sent to the list will arrive on the fax machine. I have tried several email-to-fax services include MaxEmail and MetroFax. The problem is that these services all authorize senders not based on the
From: address but on the
Return-Path of the envelope. And, every service I've tried disallows either
= characters in that address.
However, Google Groups uses a
Return-Path: of the form
email@example.com in order to track bounce addresses. Thus, I can't authorize that address for the email-to-fax service.
It seems like most transactional email services use
= in their
Return-Path: to be able to track bounces effectively. However, I can't find an email-to-fax service that accommodates this.
Things I've considered or tried:
Finding an email-to-fax service that allows a Sender alias to include
=characters (since they're both legal characters!).
Forwarding to a Gmail account, which would then forward to the fax number. However, the Gmail
Return-Path:includes the same invalid characters.
Finding an "enterprise" email-to-fax service that would accept all email to firstname.lastname@example.org and fax it, no matter what the
Return-Pathis set to. Know one?
Using an email account with Procmail to rewrite the envelope header. However, Dreamhost has discontinued their Procmail integration.
Using Mandrill to rewrite the
Return-Path:, but this seems to only rewrite the domain, which is not the problem.
Anyway, I can't believe this should be so hard, and I would greatly appreciate any suggestions.
Update: Just to put a name to it, the issue is that most mailing lists use a Variable Envelope Return Path, but I can't seem to find an email-to-fax service that supports the
= characters that VERP uses.