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Help, configuration
and tips.
| | SMTP
Settings
 The
SMTP settings dialog allows you to modify the behavior of both the incoming SMTP
service and the outgoing SMTP service. Below is a list of what each control means
and how you can use it.
Incoming SMTP Port
- This controls the port for which incoming mail connections will be accepted.
Please note that it is strongly recommend you do not change this value. The SMTP
standard specifies that all SMTP servers must use port 25 and changing this value
may prevent you from receiving incoming mail off the Internet. However, if you
are using ICS, a router or a firewall then you must ensure that the port forwarding
listens on port 25 and forwards to the port value specified here. - Incoming
SMTP Listen Only on IP
- This allows you to bind the listening port to a single IP address. If an host
name is provided then it will be converted to an IP address which will then be
used for binding.
Enable
Outgoing SMTP - If you want to use Ability Mail Server to handle your outgoing
mail, then you must enable this option. You must also ensure the outgoing mail
service is setup correctly and has been enabled as all outgoing mails will be
routed through that service for delivery across the Internet. Outgoing
SMTP Port - This controls the port for which outgoing mail connections will
be accepted. It is possible for both Incoming and Outgoing ports to be the same
or different. However, for security reasons we strongly recommend you select a
none-standard port (eg. 2525). When configuring your mail client, you must set
the port value used for the outgoing SMTP to match the port value specified here.
If an email is received on this port which is destined for an account hosted by
Ability Mail Server, then it will be delivered directly without ever passing through
the outgoing mail service. - Outgoing
SMTP Listen Only on IP
- This allows you to bind the listening port to a single IP address. If an host
name is provided then it will be converted to an IP address which will then be
used for binding.
Access
Control - See the section 'Outgoing SMTP Access Control'...below.
Max
Connections Per Port - This controls the maximum simultaneous connections
per port. This value is normally automatically generated by the setup wizard,
however, if you wish you can adjust it manually. Please note that rerunning the
wizard will overwrite any change you make to this value. - Max
Recipients Per Mail
- This is the maximum number of recipients that are allowed to be sent during
an SMTP mail transaction. Increase this value if you need to send an email to
a large number of email addresses.
Outgoing
SMTP Access Control
 If
you enabled the SMTP In and Outgoing SMTP, then you should set up your Outgoing
SMTP security options. These controls allow you to restrict what computers can
use your Outgoing SMTP and so there fore protect yourself against unauthorized
use. If you don't enable any of the access options then your Outgoing SMTP will
be useable from any computer on the Internet or in your LAN. If you enable both
options, then any incoming connection must match both the IP Range and also provide
a correct user name and password.
Enable
SMTP Authentication - This will ensure only connections which give the correct
user name and password are allowed to send outgoing emails. If your SMTP In and
Outgoing SMTP use the same port, then this information will be used to decide
which connections are entitled to outgoing privileges. Allow
Any Accounts Login Details - This allows the login details of any of the accounts
hosted by Ability Mail Server as the user name and password. This option will
any of your users to use your Outgoing SMTP safely without leaving your Outgoing
SMTP open to unauthorized use. Allow
Only The Following... - This will allow you to set and allow only a single
user name and password for the Outgoing SMTP. Enable
IP Range Control - This allows you to restrict connections to the outgoing
SMTP to a selection of IP's. If your SMTP In and Outgoing SMTP use the same port,
then this information will be used to decide which connections are entitled to
outgoing privileges. If your SMTP In and Outgoing SMTP use different ports, then
connections to the Outgoing SMTP which do not fit into this range will instantly
be disconnected. Block
IP addresses assigned to this computer - If enabled, any IP address assigned
to the computer that is running the mail server will be blocked and disallowed
access to the outgoing SMTP. This can be used for extra protection against IP
spoofing (where a remote computer can fake its originating IP). Safe
IP's - This option allows you to always allow certain IP's access to the Outgoing
SMTP. This is useful if you want to enable SMTP Authentication but also want to
allow some computers access without these security requirements. This can be useful
when using PHP mailing scripts to send mail via your Outgoing SMTP. Please note
that Safe IP's ALWAYS overrule any restrictions, therefore be careful which IP's
are placed in this list. Allow
IP Addresses Assigned to this Computer - If enabled, any IP addresses assigned
to the computer that is running the mail server will be classed as a safe IP and
will always be allowed access to the Outgoing SMTP. Please note that this setting,
like other Safe IP's, also overrules any restrictions.
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