User Guide

Appendix A 85
has_mx|no_mx corresponds to a situation, when it is
possible/impossible to identify MX records for the domain specified in
sender’s address transferred with the MAIL FROM SMTP command.
The <rcpt>|<rcpt_mask> value determines the mail recipient or a mask
for email addresses of recipients. You can use the "*" and "?" wildcards
to specify a mask for recipients' mail addresses; "*" stands for any
address. The any keyword allows any sender's address. During rule
selection from a list the program will use the first one matching the
recipient’s address mask.
If a rule has been applied, the establishment/termination of an email
session will be determined by the specified allow|deny value.
RelayRule – defines the rules for client access to gateway.
Syntax:
RelayRule=allow|deny from <ip>|<mask>|any to
<rcpt>|<rcpt_mask>
where ip|mask stands for the IP address or a mask for IP addresses of
senders (record format x.x.x.x or x.x.x.x/x.x.x.x or x.x.x.x/y). E.g.:
192.168.10.1 or 192.168.0.0/255.255.0.0 or 192.168.0.0/16). The
<rcpt>|<rcpt_mask> value determines the mail recipient or a mask for
email addresses of recipients. You can use the "*" and "?" wildcards to
specify a mask for recipients' mail addresses; "*" stands for any address
The any keyword allows any sender's address. During rule selection
from a list the program will use the first one matching the
address_or_mask/recipient’s_domain pair.
If a rule has been applied, then permission/denial of client access to
gateway will be determined by the specified allow|deny value.
E.g.:
RelayRule=allow from 192.168.0.0/16 to *
RelayRule=allow from any to *@mydomain.com
RelayRule=allow from any to *@myotherdomain.com
RelayRule=deny from any to *
– the rule allows sending of messages for clients from network
192.168.х.х to any recipient addresses; it allows sending of messages
from all clients to recipients from mydomain.com or
myotherdomain.com domains, blocking all other actions.
Incorrect access settings for clients may allow using the
application as an open mail relay.
DNSBlackList – a list of DNS Black List servers (services). Specify the list
of DNS BL services to be used during receipt of email messages. If you
are using several services, each record must have the following format: