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This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. Unless otherwise stated, all status codes described here is part of the current SMTP standard, RFC 5321. The message phrases shown are typical, but any human-readable alternative ...
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 ...
If you're having problems sending mail, there are a few troubleshooting steps you can take to fix the problem. Restart your computer:. If you haven't shut down your computer in a while, we recommend that you begin troubleshooting by restarting your computer.
LMTP uses LHLO verb instead of EHLO or HELO used in SMTP; ESMTP requires a single status for the entire message body. LMTP requires a response for each previously successful RCPT command. That is, in case of multiple recipients, after the body of the message has been transmitted, LMTP can still fail for some recipient while succeeding for the ...
This is a list of mail server software: mail transfer agents, mail delivery agents, and other computer software which provide e-mail. Product statistics [ edit ]
Callback verification, also known as callout verification or Sender Address Verification, is a technique used by SMTP software in order to validate e-mail addresses.The most common target of verification is the sender address from the message envelope (the address specified during the SMTP dialogue as "MAIL FROM").
In order to better enforce anti-spam policies, AOL does not disclose the number of recipients or emails that can be sent at one time. If you've received a notification that a limit has been met, you'll need to wait a set amount of time before you can send more emails. Most sending limit notifications inform you of how long you'll have to wait.
Create distribution lists to save time when you send emails to a group of contacts from the contacts you already have in your AOL Contacts, set up a contact list with a group of people you often send emails. For example, you email the same content to 3 friends every week. Instead, create a contact list called "Friends".