Email: Sympa Confirmation emails being rejected because of DKIM

Posted on 2026-05-01 by Christopher Causer

This blog post springs out of some debugging we in Networks Development and Support have been doing to understand why some Sympa email is being rejected by Hotmail, due to a DKIM failure. To get there, it may be good … Continue reading →

Posted in Linux, Mail Relay | Tagged | 2 Comments

The University’s mail relays and encryption

Posted on 2016-02-17 by Christopher Causer

By the time this post has been published, the Oxmail relays will most likely be using opportunistic encryption to encrypt outgoing emails, in response to actions by cloud mail providers. However, we would like to make it clear that we … Continue reading →

Posted in Mail Relay, Message Submission | Tagged , , | 4 Comments