Hello,
A new mail relay (tools-mail-02) based on Stretch was deployed today
(T208579). It replaces the old tools-mail server which was running on
Trusty.
The new server adds TLS support (using Let's Encrypt certificates),
which wasn't available in tools-mail before.
Please let us know if you notice any regressions.
Regards,
--
Giovanni Tirloni
Operations Engineer
Wikimedia Cloud Services