On Tue, 2020-07-07 at 23:50 -0400, james wrote: > I have a proton mail account, the free one, very basic.
Proton mail doesn't allow standard IMAP/SMTP, which is relevant given the below. If you want to use a mail client, protonmail is probably a non-starter for you > Will this guide allow thunderbird and other complex apps to > send/receive mail from the postfix server, (thunderbird) ? Yes, the guide uses dovecot which is a modern IMAP server. Postfix is used exclusively for SMTP as an MTA, for sending.