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(e.g. a company executive wishes to send email while on a trip using the corporate SMTP server.) This issue, a consequence of the rapid expansion and popularity of the World Wide Web, meant that SMTP had to include specific rules and methods for relaying mail and authenticating users to prevent abuses such as relaying of unsolicited email .
Because SMTP proxies can be implemented using lighter-weight programming techniques such as asynchronous I/O (for example nginx, Node.js, Netty and libevent), thousands of connections can be juggled using the same resources as a much smaller number of connections in the context of a full-blown store-and-forward email server.
Email clients using IMAP generally leave messages on the server until the user explicitly deletes them. This and other characteristics of IMAP operation allow multiple clients to manage the same mailbox. Most email clients support IMAP in addition to Post Office Protocol (POP) to retrieve messages. [6] IMAP offers access to the mail storage.
You can use a third-party email application to send and receive emails, if you'd prefer a different interface. Below are the server settings you'll need to use and links to common email app setup instructions. If you need specific help configuring your app, please contact its manufacturer. Mail server settings
SMTPS (Simple Mail Transfer Protocol Secure) is a method for securing the SMTP using transport layer security.It is intended to provide authentication of the communication partners, as well as data integrity and confidentiality.
Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and delivery methods, including the Simple Mail Transfer Protocol (SMTP) used for email transport over the Internet.
In times when both mail submission and acceptance of incoming mail were usually accomplished using the same protocol and the same server, the ability to send mail to arbitrary destinations without authentication allowed spammers to use MTAs as a means of distributing spam (since a single message transaction can request that an MTA relay a ...
If you see an image challenge question when sending mail, you should just be able to complete the challenge then send mail. If, however, you correctly answer the image challenge and still can't send mail, it could be a sign of a more serious issue with your account, which may require additional steps to secure your account.