20-09-2017, 11:39 AM
Here is a basic explanation of how e-mail works:
1. The sender composes a message using the email client on your computer.
2. When the user sends the message, the e-mail text and attachments are uploaded to the Simple Mail Transfer Protocol (SMTP) server as outgoing mail.
3. All outgoing messages wait in the outgoing mail queue while the SMTP server communicates with the DNS (domain name server, such as a directory for domain names and server IP addresses) to find out where the server is of the recipient. If the SMTP server finds the recipient's mail server, it will transfer the message and attachments. If the recipient's server can not be found, the sender will receive a "Mail Error" notification in their inbox.
4. The next time the recipient clicks "Send and Receive", your email client will download all new messages from your own email server. You've got mail.
It can be understood in the following video:
1. The sender composes a message using the email client on your computer.
2. When the user sends the message, the e-mail text and attachments are uploaded to the Simple Mail Transfer Protocol (SMTP) server as outgoing mail.
3. All outgoing messages wait in the outgoing mail queue while the SMTP server communicates with the DNS (domain name server, such as a directory for domain names and server IP addresses) to find out where the server is of the recipient. If the SMTP server finds the recipient's mail server, it will transfer the message and attachments. If the recipient's server can not be found, the sender will receive a "Mail Error" notification in their inbox.
4. The next time the recipient clicks "Send and Receive", your email client will download all new messages from your own email server. You've got mail.
It can be understood in the following video: