Setting up Sylpheed Mail Client

Install

apt install sylpheed sylpheed-doc sylpheed-plugins sylph-searcher

Setup

account settings

user-defined header: X-Mailer Sylpheed

common preferences

Receive//
auto check 5 min
check new on startup
update after incorporation
incorporate from /var/spool/mail

Send// General
notify when: pi├Ęce,jointe,annexe,attach

Compose// Spell checking
enable default en

Display// General
monospace 10

Resources

about certs for windows https://sylpheed.sraoss.jp/en/news.html