Join Greg Sowell for an in-depth discussion in this video Mail services: POP, IMAP, and SMTP, part of Networking Foundations: Protocols and CLI Tools.
- [Voiceover] Email is an essential part…of virtually every organization.…Let's first discuss mail retrieval protocols, POP and IMAP,…Then cover mail transmission with SMTP.…The Post Office Protocol is a legacy email retrieval system.…The most current version is 3,…which is why it is most often referred to as POP3.…A POP3 server listens on TCP port 110.…An email client will connect to a POP3 server,…download any emails,…store them on the client's PC,…then delete them from the server.…
Most clients have the ability to leave a copy on the server,…but this isn't the default behavior.…POP3 does have a Secure option,…whereby communication can be encrypted using TLS or SSL.…POP3S runs on TCP port 995.…There are several authentication methods…supported by the POP3 extension mechanism, such as…SASL,…a Kerberized verison,…and APOP, that uses MD5.…
Due to its advanced features and flexibility,…the Internet Message Access Protocol…has supplanted POP3 for email retrieval.…IMAP was designed with the idea that a user…will access their email from multiple clients.…
Protocols are the lifeblood of modern communication. By the end of this course, you'll know what you need to troubleshoot any network connection and keep the communication flowing.
Note: This course maps to domain 3 of the MTA Networking Fundamentals exam.
- Identify reasons why connectionless transmissions are faster.
- Determine what type of attack a gratuitous ARP announcing itself as a legitimate host indicates.
- State what IGMP snooping is useful for.
- Describe the best approach to use FTP to view and rename files on a server when your client is behind a firewall.
- Assess whether SSH is natively supported on Windows or not.
- List good uses for the arp command.