Email Protocols
Email Protocols
Summary of Advantages and Disadvantages
The main differences between IMAP, POP3 and HTTP are that IMAP leaves your messages on the server, POP3 email allows you to download you email and it can be deleted from the server. Both require a mail program to use and are platform independent. SMTP is used to send email. Finally, HTTP allows for a user to send and receive email using a web service. Advantages of using IMAP or that you can receive email on any computer, but it is slower. POP3 is much faster and uses less server space, but it works on one computer.
Mail Component | Desc. | Send /Rec. | Mail Client | Acct. Access | Message Location | SSL | Resource |
Microsoft Exchange Server | Centralized server to administer mail services in a company Server of a client-server developed by Microsoft that utilizes their infrastructure products including mail, calendar, contacts, etc.J.miller | Send and Receive mail | Runs on Web Server | Many accnts | Manages all mail Requires mail gateway to route and convert mail to smtp | See all ports below. | |
POP3 | Post office protocol version 3 can be used by local mail clients to retrieve email using a TCP/IP connection. POP has several versions, with POP3 being most current. J.miller | Retrieve Mail | Platform Independent Runs on all servers (Mac, Win, Linux etc.) | 1 User access account | Message removed from Server | Non-SSL Port 110 Secure POP3 (SSL-POP) - port 995 | |
IMAP | Internet Message Access Protocol is the other most prevalent Internet standard protocol for mail retrieval.J.miller | Retrieve Mail | Platform Indepedent, runs on all servers (Mac, Win, Linux etc.) | Multiple users access 1 account | Stays on Server, access anywhere | Non-SSL port 143 https IMAP4-SSL port 585 IMAP4 port 993 | |
HTTP | Hypertext Transfer Protocol or Webmail not dedicated to email communications, but rather can be utilized as a vehicle for accessing your mailbox. This may be easily coined under the term web based e-mail. J.miller | Send and retrieve mail through website This protocol can be used to compose and retrieve e-mail from your account. | Runs on web server HTTP - port 80 | 1 account | stays on server | https port 8080 | |
Additional Server Type | Other Mail Servers: EX: Google | Still requires POP3, IMAP and SMTP | Platform independent | 1 account | connect your webmail to your desktop mail | https Port 8080 | |
SMTP | Simple Mail Transfer Protocol is used to send email, not retrieve them. | Send Mail : This is the protocol that delivers your e-mail to the recipient’s server. | Platform Independent, but requires a mail program or web server | MX record used to identify which server to send mail. Uses MIME extensions for attachments. | N/a | NON-SSL Port: 25 Secure SMTP (SSMTP) - port 465 |
Collective information from students of Ed Tech Networking 673
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