Ignored subject filters (regular expressions)

[AM13337]

I am attempting to ignore emails using the incoming mail filters under Config > Email Settings > Incoming Mail.

When i use [] in the filter string it ignores all mail messages.

Can you suggest a way to ignore mail containing those characters?

[cycleheat]

Have you tried escaping the brackets, those are special characters to regex, but I haven't tried it myself.

Maybe this would match (\[)(\]). Most systems would consider \[\] to only match consecutive [] where including the parenthesis would say to match them individually.