Simple Mail Transfer Protocols (SMTP) commands, control and manage the sending of emails by using a set of protocols which are instructions and rules that facilitate the emails transfer across networks.
Gmail uses the technology or the protocols to send mails. It works on port number 487 for SSL. IMAP and SMTP are the protocols used.
There are many more than three protocols which can operate at the application layer. Some of these are; Telnet FTP TFTP SMTP IMAP POP DNS RARP BOOTP SNMP CMOT
Port number of SMTP is 25 and of IMAP is 143. (These are the standard port numbers used)
SMTP - 25, 465, and 587 POP - 109, 110, and 995 IMAP - 143, 220, and 993
IMAP (Internet Message Access Protocol) for Hotmail allows users to access their Hotmail emails on their iPhone while keeping the emails synced across multiple devices. When you configure your Hotmail account using IMAP on your iPhone, any changes you make—like reading, deleting, or organizing emails—will reflect on both the iPhone and other devices. To set it up, you'll need to enter the IMAP server settings for Hotmail, which typically include the incoming mail server as "imap-mail.outlook.com" and the outgoing server as "smtp-mail.outlook.com." This ensures a seamless email experience across your devices.
SMTP (Simple Mail Transfer Protocol) - sends mail only POP (Post Office Protocol) - retrieves mail and manages mailboxes IMAP (Internet Message Access Protocol) - retrieves mail and manages mailboxes
SMT (Simple Mail Transfer), POP3, or even plain HTML
Email monitoring and recording software makes it easy to monitor all outgoing and incoming emails on your network. Actually, there are several kinds of emails according to the protocols: 1). POP3/IMAP/SMTP emails, which are sent/received by an email client. To monitor these emails, you only need to deploy an internet monitoring program at your internet entrance. However, POP3/IMAP/SMTP over SSL can not be monitored because SSL traffic is encrypted. 2). Web based emails. Web based emails use HTTP protocol. Because different ISP uses different formats, it is difficult to parse its content. Some programs, for example: WFilter Enterprise, with an in-build web email formats database, have the ability to parse web-based email content. 3). Exchange emails. To monitor exchange server emails, you only need to configure the exchange server to forward all emails to the administrator email box.
To add an IMAP email account in MSN Mail, open the Mail app and go to Settings. Select "Add Account" and choose "IMAP" as the account type. Enter your email address, password, and the required incoming (IMAP) and outgoing (SMTP) server settings. Once you've filled in the details, save the account, and it should sync your emails.
Requests for email data and file transfers are typically handled by email servers and file transfer protocols. Email servers, such as Microsoft Exchange or Gmail, manage the sending, receiving, and storage of email data, while protocols like SMTP (for sending emails) and IMAP/POP3 (for retrieving emails) facilitate communication. For file transfers, protocols like FTP (File Transfer Protocol) or SFTP (Secure File Transfer Protocol) are commonly used to securely transfer files between systems. These systems ensure that data is transmitted efficiently and securely between users and servers.
Examples of application layer protocols include Hypertext Transfer Protocol (HTTP), which is used for transferring web pages; File Transfer Protocol (FTP), which facilitates file transfers between computers; and Simple Mail Transfer Protocol (SMTP), used for sending emails. Other notable protocols include Post Office Protocol (POP) and Internet Message Access Protocol (IMAP) for retrieving emails, as well as Domain Name System (DNS) for resolving domain names to IP addresses. These protocols operate at the highest layer of the OSI model, enabling communication and data exchange between applications.