Email System

How email system works :

MUA ---> MTA ---> MTA ---> MDA ---> MUA

• MUA : Mail User Agent (ex : Thunderbird, Webmail…) Read and write emails
• MTA : Mail Transfer Agent (ex : Opensmtpd, Postfix…) Send messages accross the network - Protocol SMTP
• MDA : Mail Delivery Agent (ex : Dovecot, Cyrus IMAP…) Stores and deliver the messages to the MUA - Protocol IMPA/POP3/JMAP