XF 2.3 Spam regex

[Robert9]

Can I use a regex to limit the length of an email address?

mk.itnpad2209jaebd.comiaopxxirmfz7cdmail.jaebd.com587mk.itnpad2209@jaebd.comiaopxxirmfz7cdinbox5030

Can I use a regex to block Russian characters?

I tried both, but failed.

 

[nocte]

I guess you can do this (and many other things) with "Signup abuse detection and blocking" by @Xon:

X

Signup abuse detection and blocking

Nov 20, 2018

Provides a toolkit to reduce signup spam

• Xon
• Add-ons [2.x]

You could insert a regex for Russian characters. I am sure you will find one, e.g.:

https://stackoverflow.com/questions/1716609/how-to-match-cyrillic-characters-with-a-regular-expression

Correct me if I am wrong, but I think catching the long email addresses are not so easy with a regex. You can use a pattern to match an email address, but you cannot use a quantifier at the end to limit the length of the whole string. In other words: Something like this ^([\w\.-]+@([\w-]+\.)+[\w-]{2,10}){100,}$ for 100+ characters will not work (well, it will work in some way, but it will only catch strings with at least 100 @ characters. That's not what we are looking for).. :-/

Instead you could try using the * wildcard:

*@**********.
**********@*