Let's Encrypt is making changes to the certificates it issues from 11th February. This has some impact on the XMPP network.
No action required for Prosody operators. Operators of servers running ejabberd need to make sure they are running version 25.08 or later.
More details in our blog post: https://blog.prosody.im/2026-letsencrypt-changes/
Upcoming changes to Let's Encrypt and how they affect operators
On 11th February, Let’s Encrypt will be rolling out a change to the
certificates they issue to servers by default. Although there is generally
nothing that Prosody operators need to do, servers using the new certificates
may experience problems connecting to some other XMPP servers on the network.
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