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The STARTTLS command for IMAP and POP3 is defined in RFC 2595, for SMTP in RFC 3207, for XMPP in RFC 6120 and for NNTP in RFC 4642. For IRC, the IRCv3 Working Group defined a STARTTLS extension, though it was later deprecated. [1] FTP uses the command "AUTH TLS" defined in RFC 4217 and LDAP defines a protocol extension OID in RFC 2830.
SMTP Authentication, often abbreviated SMTP AUTH, is an extension of the Simple Mail Transfer Protocol (SMTP) whereby a client may log in using any authentication mechanism supported by the server. It is mainly used by submission servers, where authentication is mandatory.
Late 1998 this was revoked when STARTTLS was standardized. [2] With STARTTLS, the same port can be used with or without TLS. The use of well-known ports for mail exchanges communicating with SMTP was discussed in particular at the time. [3] Port 465 currently shows [4] as registered for both Source-Specific Multicast [5] and submissions.
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 ...
Similar STARTTLS extensions exist for the communication between an email client and the email server (see IMAP4 and POP3, as stated by RFC 2595). STARTTLS may be used regardless of whether the email's contents are encrypted using another protocol. The encrypted message is revealed, and can be altered by, intermediate email relays.
PGP, p≡p, Hushmail, and Ciphire, among others can all be set up to work in this mode. In practice, STARTTLS in SMTP is often deployed with self-signed certificates, [8] which represents a minimal one-time task for a system administrator, and results in most email traffic being opportunistically encrypted. [9]
Settings may be in a different location in each email client, though the AOL server and port settings will always be the same. For additional questions specific to the email client, check the manufacturer’s website. Manufacturers cannot answer questions about your Netscape/AOL Mail settings, or your Netscape username or password.
In Mail on Mac, click Mail and then choose Settings from the menu. Select your AOL Mail account from the account list. Select the Server Settings tab. Delete and re-enter your AOL account password from the Password fields under the Incoming Mail Server and Outgoing Mail Server sections. Click Save.