They may not support regular expressions simply because there are better ways to handle the problem. I'd suggest contacting Barracuda not with a RegEx question, but a "what's the best way to avoid this situation" question, as they're surely familiar with the problem and have well-tested methods for handling this problem.
If you had to use regular expressions, then noticing his display name and reject all the spammy variations is tougher than it might appear to be, especially if the appliance doesn't use full Perl regular expressions. Not only do you have to deal with minor formatting variations, but there may be difficulties with Unicode look-alike characters that could fool you and other assorted nonsense. I'm nowhere near a regex guru, so perhaps another monk might chime in with some good suggestions--there are several monks here that always impress me with their regex-based solutions to some problems.
If I had to solve the problem, then some things I might try would be (assuming you can do it with the device in question):
...roboticus
When your only tool is a hammer, all problems look like your thumb.
In reply to Re: Regex Expression to filter email for Barracuda Email Appliance
by roboticus
in thread Regex Expression to filter email for Barracuda Email Appliance
by higginss20
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