Utilities: Administration: Server: Server Settings: Security: Spam Blocking

These settings allow you to determine the length (in lines) of the body of emails submitted by first time subscribers when sending a join request. The purpose for setting a limit on the length of a join/subscribe email is to prevent "spammers" to send large amounts of spam or junk mail to your join address. By limiting the length of emails allowed, you can weed out much of the spam which could otherwise be received by and eventually overload your server.

This setting is optional; it is not necessary to set a limit on any email received, but it can be set here if desired, depending on the amount of unwanted email received at your join address. Small amounts of spam are to be expected, and do not warrant setting this feature. It is intended to avoid high volumes of unwanted email.

Check join mail for spam

This yes/no setting enables the spam blocking feature. If set to "No", mail of all lengths will be allowed at the subscribe address. If set to "Yes", join requests may be rejected based on the number of body lines set.

The default is set to "No", allowing all mail to get through. It is recommended that you leave it this way initially, and only make adjustments as necessary depending on the amount of spam and unwanted email you begin to receive, and the size of these messages.

When a message is rejected, an error message will be sent to the sender informing them that the email is too long, with instructions on what to do. It will look something like this:

           Final-Recipient: join@example.net

           Action: failed

           Status: 5.0.0

           Diagnostic-Code: smtp;554 mail sent to subscribe address is too long - looks like spam!

           Send a blank email to subscribe (no long signatures!).

           DES

           250-PIPELINING

           250-8BITMIME

           250-SIZE 10000000

           250-DSN

           250-ETRN

           250-STARTTLS

           250-DELIVERBY

           250 HELP

           DNS (PTR record) assigned.

           addresses which

           220      have no reverse-DNS (PTR record) assigned.

           which

           220      have no reverse-DNS (PTR record) assigned.

           ions from IP addresses which

           220      have no reverse-DNS (PTR record) assigned.

Max subscribe mail body lines (text messages)

Sets the maximum number of plain-text lines permitted in the body of a join request email.

The default number of text lines is 6. If set to "Yes" above, emails to the subscribe address with more than 6 text lines will be rejected. Note that this is a very conservative number; remember that email signatures sometimes add lines.

Max subscribe mail body lines (HTML messages)

Sets the maximum number of HTML lines permitted in the body of a join request email.

The default number of HTML lines is 16. If set to "Yes" above, emails to the subscribe address with more than 16 HTML lines will be rejected. Note that this is a very conservative number; remember that email signatures sometimes add lines.

Also note that if any HTML is detected in the message, each line is scanned for "<a href" to see if there are any image tags. No subscribe request should include image tags, so if one is found, the message is immediately marked as being spam.

Allow name match

This is a server-wide setting, enabled "Yes", or disabled "No" here. This allows or rejects join/subscribe email that matches a member name, but not the email address.

If this is set to "Yes", then even if the email address is not that of a member, but the name is that of a member, then ListManager will see this as a subscribe email from a valid member and will accept the message. If this is set to "No", and the email address is not a member, it will not be accepted, even if the name is that of a member; it will be treated as spam. This default for this feature is set to off "No".

More

1.   Utilities: Administration: Server: Server Settings

1.   Utilities: Administration: Server: Server Settings: Security: User Limits

2.   Utilities: Administration: Server: Server Settings: Security: Bans

3.   Utilities: Administration: Server: Server Settings: Security: Web

4.   Utilities: Administration: Server: Server Settings: Security: GUI Hosts

5.   Utilities: Administration: Server: Server Settings: Security: Spam Blocking