On Mon, Jan 15, 2024 at 10:10 AM Marc Chantreux wrote: > MUA ? MUA = Mail User Agent, a.k.a. an email client: a program you use to compose and read email. Apple Mail, Microsoft Outlook, Mozilla Thunderbird, old school programs like mutt, ELM, MH, /bin/mail or Mail/mailx. O course for many of us our MUA is not a standalone program but a web app running in a browser (e.g. GMail), but that still counts. The MUA is specifically distinguished from the Mail *Transfer *Agent (MTA) which is responsible for actually getting the email where it needs to go; Microsoft Exchange and sendmail are MTAs. -- Mark J. Reed