Target Skills:

Ability to configure SMTP services.
     
     
     
     
     
     
     
     
     
     
     

More Info:

Configuring SMTP Services (Admin Guide)

 

Configuring SMTP Services 


SMTP service settings control how your server sends messages to other servers, and how it receives messages from other servers and clients.  You configure SMTP services by going to Configuration/Services/SMTP on the console.

The different configuration settings are organized into the following 6 categories and tabs:

System

General settings for the SMTP system. 
Address completion domain:  The "@" part of the message address you want filled if it is not specified (Default is machine domain)

Local domains: A list of the domain names the server serves (especially useful for virtual domains).

Allow password login: Sets user password login with optional encryption (useful for Authenticated SMTP) (Default is on, minimum cipher length 0).

Unix delivery: Path to an alternative Unix mail delivery program for Unix Delivery enabled user accounts (Default is /usr/bin/mail).

Program delivery:  A safe User/Group account to run as when delivering mail to a program (Default is ID of 1)

Accept

Settings for how the server accepts messages from other servers and clients. 
Defer delivery to remote hosts: Prioritizes processing of incoming messages before delivering outgoing ones.

Verify each recipient's address: Verifies addresses before accepting the body of the message.

Lookup client machine names: Performs host name resolution for all connecting clients.

Maximum number of MTA hops:  Sets the number of times a message can be routed between servers before it bounces (stops repetitive looping of bad messages). (Default is 30)

Minimum free disk space: Sets minimum free disk space before the server will begin temporarily rejecting new messages (Default is 49 Kbytes).

Allow SMTP command `VRFY', `EXPN', `ETRN', `SIZE': Enables dialog commands to verify user names, verify mailing lists, defer queue processing, and state message size (Default is all enabled).

Autoreply

Settings for the default text of auto-reply messages, if the account has activated auto replies but has not specified a reply message. 
Default vacation-mode reply message: Reply when a user is away.

Default echo-mode reply message: Reply which includes the original message.

Default reply-mode reply message: Reply to contact the server administrator.

Error

Settings for how the server should handle errors when attempting to deliver a message. 

Methods of handling errors are the following:

a) Return an error message to the sender of the message.
b) Notify the postmaster of the error via email.
c) Log the error in the log file.
Possible error situations are the following:
a) When an address refers to an unknown local account (Default is all methods).
b) When maximum MTA hops exceeded (Default is Notify postmaster and Log the error).
c) When disk quota exceeded (Default is Return message to sender).

Address

Settings for how the server processes addresses.
Envelope Rewrite Methods: Changes recipient addresses using account attributes in the Directory.

From Address Rewrite Style: Changes how sender addresses are rewritten (Default is "john doe"<jdoe@company.com>).

Alternate Search Methods: How to re-search if the server can not find a recipient address in the Directory (Default is Search by user ID (uid)).

SMTP Routing Table: Delivers messages with certain address domains to specific servers. 

Access

Settings for which users, domains, and IP addresses are allowed access to SMTP services on the server.
Allow: Filter pattern of who is allowed access. 

Deny: Filter pattern of who is denied access.

 

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