Update our doc to Icedove being the recommended email client
Originally created by @sajolida on #10446 (Redmine)
git grep claws -- "*.mdwn"
is a good start.
- intro of claws_mail_to_icedove.mdwn
Feature Branch: doc/10446-icedove-recommended
Parent Task: #5663 (closed)
Edited by sajolida