[Koha-bugs] [Bug 28729] Return-path header not set in emails

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=28729

--- Comment #44 from Martin Renvoize <martin.renvoize at ptfs-europe.com> ---
Created attachment 126527
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=126527&action=edit
Bug 28729: Make Koha::Email->send_or_die handle returnpath

Koha used to rely on Mail::Sendmail for sending emails. As an SMTP
client, the library would extract the from address from the Sender
header to pass along in the MAIL FROM: field of the SMTP protocol [1].

This was overlooked when we moved to Email::Stuffer/Email::Simple and
there's a different behavior as it expects the envelope to be passed and
falls back to extracting the 'From' header when said envelope is not
found [2].

This patchset re-introduces the behavior from Mail::Sendmail by
overriding the send_or_die method locally (in Koha::Email) and doing the
right thing.

Unless an explicit {from} parameter is passed, it extracts the MAIL FROM
envelope from the Sender header, as Mail::Sendmail did, and calls
$self->SUPER::send_or_die with the right parameters.

To test:
1. Apply the unit tests
2. Run:
   $ kshell
   k$ prove t/Koha/Email.t
   => FAIL: Sender is not handled correctly!
3. Apply this patch
4. Repeat 2
   => SUCCESS: Tests pass!
   The from parameter is correct!
   No Sender header sent!
5. Sign off :-D

[1] https://metacpan.org/dist/Mail-Sendmail/source/lib/Mail/Sendmail.pm#L284
[2]
https://metacpan.org/pod/Email::Sender::Manual::QuickStart#envelope-information

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