mxORB

[problem] Incorrect blacklist regular expression

The default mxORB 2.0 and 2.1 email address blacklist settings contain an incorrect regular expression.

This problem will also exist in mxORB 2.2 and 2.3 installations if they have been upgraded from a previous version of mxORB.

To fix the problem follow the steps below:

1. Open the Configuration tool and double click on the Blacklist icon
2. On the Sender Email Addresses tab locate and select the regular expression
   
   \s*<?\s+\d{5,}\@(?:aol|bigfoot|compuserve|excite|hotmail|juno|prodigy|yahoo)\.(?:com|net|org)
   
   If the regular expression does not exist then you do not need to continue with these instructions
3. Click Edit and change the Email address to:
   
   ^\S+\d{5,}\@(?:aol|bigfoot|compuserve|excite|hotmail|juno|prodigy|yahoo)\.(?:com|net|org)$
   
   
4. Click OK to update the email address and then click OK to save the Blacklist settings

More Information

The regular expression is used to match email addresses containing 5 or more numbers at one of the major ISPs. For example: maddog24434@yahoo.com

If you wish to change the number of digits matched by the expression, change {5,} in the expression to the desired number, for example: {7,} will blacklist email addresses containing seven or more digits.

Date: July 30th 2004