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The JSON Meta Application Protocol (JMAP) is a set of related open Internet Standard protocols for handling email.JMAP is implemented using JSON APIs over HTTP and has been developed as an alternative to IMAP/SMTP and proprietary email APIs such as Google's Gmail and Microsoft's MAPI (used by Outlook). [1]
On the other hand, UTF-16 must be transfer encoded to fit SMTP data format. Although not strictly required, UTF-8 is usually also transfer encoded to avoid problems across seven-bit mail servers. MIME transfer encoding of UTF-8 makes it either unreadable as a plain text (in the case of base64 ) or, for some languages and types of text, heavily ...
Message file format Encrypted database Virtual folders Scheduled backup New mail notification Customizable interface Customizable keybindings Fragmented messages [Note 1] Database search with regular expressions support Indexed search Search folders [Note 2] IMAP ticker tray icon tooltip sound Search IDLE Alpine
getmail is a simple mail retrieval agent intended as a replacement for fetchmail, implemented in Python. [5] It can retrieve mail from POP3, [3] IMAP4, [5] and Standard Dial-up POP3 Service servers, with or without SSL.
The initiating host, the SMTP client, can be either an end-user's email client, functionally identified as a mail user agent (MUA), or a relay server's mail transfer agent (MTA), that is an SMTP server acting as an SMTP client, in the relevant session, in order to relay mail. Fully capable SMTP servers maintain queues of messages for retrying ...
Although the traditional format for email header section allows non-ASCII characters to be included in the value portion of some of the header fields using MIME-encoded words (e.g. in display names or in a Subject header field), MIME-encoding must not be used to encode other information in a header, such as an email address, or header fields like Message-ID or Received.
SMTP proxies often implement the first and/or only layer of defence in an inbound anti-spam filtering system, where they can analyze messages using a spam content filter or antivirus program, block or rate limit connections using DNS blacklists and reputation systems, and load-balance SMTP connections to prevent overloading of mail servers.
The Maildir e-mail format is a common way of storing email messages on a file system, rather than in a database.Each message is assigned a file with a unique name, and each mail folder is a file system directory containing these files.