The
MAILsweeper SMTP delivery service will bring up one TCP/IP connection per
domain for delivery purposes. It is possible to make the delivery service
bring up more connections per domain. This could be of use in a high
throughput environment or times when back logs are caused by problem
messages. This will bring a new connection when there are a defined number
of messages (MsgLimit1) waiting to be delivered up to a maximum number
(DomainLimit1) of connections.
In
mailswp.cfg ,in the section [SMTP Delivery]. Add the following
[SMTP
Delivery]
v:MsgLimit1=$I50
v:DomainLimit1=$I25
Stripping of SMTP
received headers
It
is possible to make MAILsweeper remove any SMTP received headers from any
messages it processes.
To
do this add the following entry to mailswp.cfg:
Strip
Received Headers
[SMTP
Receiver]
v:StripReceivedHeaders=$I1
To turn stripping
off again set the value to $I0
Make
sure customers are aware of the potential issues explained below (in bold)
before using this though: (from the manual)
StripReceivedHeaders
(*) REG_DWORD
If
non-zero, then mail messages which SMTPRS receives from hosts which are in the
AcceptForRelayFrom list, will have their Received: headers removed.
Similarly for messages received on authenticated connections. This is
intended as a security features for organizations which do not wish the
details of their internal networks to be exposed in messages sent over the
Internet. However, it makes it more difficult to trace the origin of
messages. WARNING: if you turn on this feature while leaving the
AcceptForRelayFrom list at its default setting of "*", you become
a "laundry" for spam - there is no way (other than the log files)
of tracing mail back to the originating system. It is therefore essential
that you understand the full implications of this before turning this
option on. Default: 0.
RBL custom
response
In
MAILsweeper for SMTP SP2, a new feature was added allowing the
specification of a real time black list host.
This
was configured as follows (from the SP2 release notes)
RBL Configuration
To
set up the RBL domain add the following to mailswp.cfg [SMTP General]
section:
v:RBLDomain=$S"Required
Domain".
Note:
This service may require a subscription and IP address registration with
the Real Time Blacklist organization.
e.g
v:RBLDomain=$SBlackholes.mail-abuse.org
However
the message returned to the sending SMTP relay can also be configured.
The
default message is:
550
This system is configured to reject mail from 194.168.90.24
There
is a new configuration entry v:RBLResponse=$S"Required Message"
e.g.
[SMTP
General]
v:RBLDomain=$SBlackholes.mail-abuse.org
v:RBLResponse=$SMessage
Blocked by RBL
This
would return the following message:
550
This system is configured to reject mail from 194.168.90.24 Message Blocked
by RBL
Max Delivery
threads
The
MAILsweeper SMTP delivery service will try and deliver up to 50 connections
at a time. This number can be controlled via a configuration entry.
In
MAILswp.cfg add the following to [SMTP General] section
[SMTP
General]
v:MaxDeliveryThreads=$I30
This
will reduce the number of delivery treads from 50 to 30
Max Job time
If
the processing of a message takes longer than a specified number of
seconds, the priority of the message will be lowered so other messages will
be processed. The message will remain in the \unchecked folder. The default
value is 30 seconds but this can be changed in mimeswp.cfg in the [Jobs]
section
MAILsweeper
will, by default, process up to 5 messages simultaneously. The value can be
changed via the use of a configuration entry. This is achieved in
mimeswp.cfg in the [jobs] section.
It
is important to be aware that no MAILsweeper testing is done on
configurations with a setting over 5 and anything over that would be unsupported.
Experience has show anything over a setting of 8 leads to performance
reductions.
Changing
Disclaimer font size
The
font size for disclaimers can be set via the use of a configuration entry.
The entry is added to the scenarios.cfg file to the relevant disclaimer
section:
v:AddText=$S"This
electronic message together with any attachments is confidential. If"
Setting receiver
service port
The
SMTP receiver service port can changed from the default setting of 25. This
is achieved in the file mimeswp.cfg in the [SMTP Receiver] section.
[SMTP
Receiver]
v:PortNo=$I25
Disclaimer in
Japanese
Check
to make sure Asian language pack is installed/ selected
Select
UTP-8 and ISO-2022 Character set
Restart
Mailsweeper Server
On outbound emails, the MAILsweeper
application evaluates the message being processed and if no Extended
characters are detected then the plain text disclaimer is applied, however
if the message ‘does’ contain Extended characters then the rich text
disclaimer is used
The
current MIMEsweeper for SMTP 5.2 application does however provide this
functionality, i.e. the full disclaimer being applied to all messages
following the specific route (based on route and not character set). There
is no work around for the 4.3 application
