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I'm setting up a new mail server and got this message: May 21 11:55:09 vader dovecot[4090]: imap-login: Error: Diffie-Hellman key exchange requested, but no DH parameters provided. Set ssh_dh=</path/to/dh.pem The Dovecot parameter is actually: ss*l*_dh<=/path/to/dh.pem not ssh... Fedora release 32 (Thirty Two) dovecot-2.3.9.3-1.fc32.x86_64 Many thanks for such useful software. Bill

Don't know if this was corrected in 2.3.4 (haven't upgraded yet but didn't see it in the notes) - but in 2.3.3 I see this in my log: imap-login: Error: Diffie-Hellman key exchange requested, but no DH parameters provided. Set ssh_dh=</path/to/dh.pem So...either there's an undocumented feature of SSH-over-IMAP (that's Dovecot - always on the cutting edge!) or someone had a coffee shortage during a coding session... -- Daniel