[Rails] How to set 'Return-Path' in ActionMailer to avoid SPF failure?

[Stian Grytøyr]

Guan Yang <guan at unicast.org> wrote:

> It's not an MTA configuration issue. Actually, it's even easier to set
> Return-Path when you're sending with SMTP, because Return-Path is
> simply the envelope sender address. Consider:

I may have misread OP, but I got the impression that he needed to 
set the Return-Path to something different from the envelope sender
address. In that case, you'd need to configure the MTA to _not_ set
the Return-Path to the same as the envelope sender address.

-- 
Regards,
Stian Grytøyr