curl / curl

A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTSP, SCP, SFTP, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features

dovecot / core

Dovecot mail server

neomutt / neomutt

✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat

cyrusimap / cyrus-imapd

Cyrus IMAP is an email, contacts and calendar server

SirLouen / pecl-mail-imap

An extension to operate with the IMAP protocol, as well as the NNTP, POP3, and local mailbox access methods.