MAIL SERVER

Email Server Port 25

MAIL CLIENTSA Computer program use to access and manageUsers mail.1.Thunder bird2.Outlook3.Evalution4.Kmail5.IBM Lotus Note

WEBMAIL CLIENTS1.Horde2.Open webmail3.SquirelMail4.Roundclube

How mail servers work?

Outgoing

ServerClient Server

me@sfn.ac.lk

OUTGOING SERVERS – (SMTP/MSA PROTOCOL)

Outgoing

ServerClient Server

me@sfn.ac.lk

Mail Directoryme B

C D

•It using SMTP , MSA protocol.•In this process looking MX Record from DNS Server

OUTGOING SERVERS – (SMTP/MSA PROTOCOL)

INCOMING SERVERPOP3 IMAP4

Since email needs to be downloaded into desktop PC before being displayed,

you may have the following problems for POP3 access: You need to download all email again when using another desktop PC

to check your email.

May get confused if you need to check email both in the office and at home.

downloaded email may be deleted from the server depending on the

setting of your email client.

Since email is kept on server, it would gain the following benefits for IMAP access:

No need to download all email when using other desktop PC to check your

email.

Easier to identify the unread email.

Example: mail.sfn.ac.lk

PROTOCOL IN MAIL SERVERPROTOCOL USE PORT

POP3 Incoming mail server 110

IMAP4 Incoming mail server 143

SMTP Outgoing server 25

MSA Outgoing server 587

HTTP Webmail