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Toggle Common status codes subsection. — 2yz Positive completion. — 3yz Positive intermediate. — 4yz Transient negative completion. — 5yz Permanent negative completion. References. List of SMTP server return codes. This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in ...
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 ...
Operation. [] A message transfer agent receives mail from either another MTA, a mail submission agent (MSA), or a mail user agent (MUA). The transmission details are specified by the Simple Mail Transfer Protocol (SMTP). When a recipient mailbox of a message is not hosted locally, the message is relayed, that is, forwarded to another MTA.
Fix sending and receiving issues with third-party email apps. If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Use these steps to identify and fix the source of the problem.
SMTP Authentication. 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. [1]
POP3-995-SSL SMTP-465-SSL. IMAP. Incoming mail server (IMAP): imap.aol.com Outgoing mail server (SMTP): smtp.aol.com. IMAP-993-SSL SMTP-465-SSL. Instructions for common email apps. 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 most common reason for a failed delivery is that the email address entered isn't valid. If the delivery failure message says the account doesn't exist double check the spelling of the address you entered. A single misplaced letter could cause a delivery failure. If the message keeps getting bounced back, make sure the account is closed or ...
e. In computing, the Internet Message Access Protocol (IMAP) is an Internet standard protocol used by email clients to retrieve email messages from a mail server over a TCP/IP connection. [ 1 ] IMAP is defined by RFC 9051. IMAP was designed with the goal of permitting complete management of an email box by multiple email clients, therefore ...