IMAP

IMAP, or Internet Message Access Protocol, is a standard protocol that allows email clients to access email messages from a mail server. IMAP has several key features, including:

• Centralized storage: Messages are stored on the mail server, not on the user's device. This means that users can access their messages from any device with an email client.
• Synced across devices: Changes made to a mailbox are synced across all devices.
• Selective downloading: Users only download messages when they click on them, and attachments aren't automatically downloaded.
• Multiple clients: Multiple email clients can manage the same email box.

IMAP is one of the most common protocols for email retrieval, along with POP3 (Post Office Protocol). IMAP servers typically listen on port 143, and IMAP over SSL (IMAPS) uses port 993.

IMAPS connections are encrypted, which provides increased security. However, cybercriminals often target passwords, so users can protect themselves with multi-factor authentication and user activity monitoring tools.