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IMAP server settings for Yahoo Mail. IMAP is the best way to connect your Yahoo Mail account to a desktop mail client or mobile app. It allows 2-way syncing, which means everything you do remotely is reflected in your Yahoo Mail account no matter where or how you access it. Here are the settings you'll need to configure your mail client or app. Incoming Mail (IMAP) Server. Server - imap.mail.yahoo.com; Port - 993; Requires SSL - Yes; Outgoing Mail (SMTP) Server. Server - smtp.mail.yahoo.com; Port - 465 or 587; Requires SSL - Yes; Requires authentication - Yes; Your login info. Email address - Your full email address (name@domain.com)
IMAP was designed with the goal of permitting complete management of an email box by multiple email clients, therefore clients generally leave messages on the server until the user explicitly deletes them. An IMAP server typically listens on port number 143. IMAP over SSL (IMAPS) is assigned the port number 993.