An animated tutorial by Ken Knight.
The Mail Server is an ESMTP server based on RFC821.
It can take delivery of mail for:
Accept delivery for local mailboxes
Check this option to accept delivery of messages addressed to local users (ie user@ type addresses).
Accept delivery for all mailboxes in a domain
Check this option to accept delivery of messages to any user in the specified domain.
In the above example the server would accept mail for all users @netcruiser.hn.org and @netcruiser.eyep.net.
Accept delivery for individual mailboxes
Check this option to specify where mail is stored for specific users.
In the above example the server would store mail addressed to firstname.lastname@example.org in the admin mailbox.
Enable forwarding of non-local mail
Check this option to enable forwarding. Forwarding is done by adding the messages in the outbound queue of the Mail Relay.
Access to forwarding can be limited by host name or by ip address. Wildcards can be used, for example: 192.168.* or *.mydomain.com
The POP3 Server is based on RFC1939.|
It allows access to local mailboxes through a pop3 client (such as most mail readers).
By default mailboxes are set up not to allow pop3 access. Access is controlled through a password.
Access options can be changed from Mailbox Properties in the Mailboxes display.
The Mail Relay is responsible for delivering the messages in the outbound queue.|
It uses an ESMTP client based on RFC821.
Messages are placed in the outbound queue by the Mail Server (for forwarding) and, optionally,
the "Send E-Mail" option can be configured to use Mail Relay.
Send delivery failure notifications
Check this option to generate a message to the sender when Mail Relay has given up on delivering a message or
when delivery encounters a permanent failure.
Send delivery delay notifications
Check this option to generate a message to the sender when the specified number of hours has elapsed and
Mail Relay has not been able to deliver a message.
Attempt delivery to recipient Mail Exchanger
This is the default way of delivering mail. The mail is delivered to the address pointed to by the MX record of the recipient's domain.
The address of a DNS server must be specified.
Attempt delivery to recipient address
With this method mail is delivered directly to the recipient's domain.
Set this option if you expect to deliver mail to recipient's who do not have MX records set up (eg some dynamic domains).
Attempt delivery to alternate mail server
Check this option if you want mail to be relayed to another mail server.
You will need to specify the address of a mail server.
Note: When multiple delivery options are selected, delivery will first be attempted to the Mail Exchanger, then to the recipient's address,
then to the alternate mail server.
The Pop3 Client is based on RFC1939.|
The Pop3 Client can be used to retrieve messages from a pop3 server to a local mailbox.
This is useful for combining mail from multiple remote mailboxes into one local mailbox, which can then be accessed using
any pop3 mail reader from the local Pop3 Server.
The Pop3 Client can also be configured to browse or delete messages from the server without retrieving the messages first.
This is enabled by checking the Leave messages on server option.