Hi..
New here.. looking for clarity around domain names in a rule.
I got lots of spam from, for example, wxyz.com
However, this may come from abcd.wxyz.com
or another variant such as efgh.wxyz.com
Do I have to list these individually or will blocking only wxyz.com catch them both, or neither?
Do I need a wildcard as in *.wxyz.com ?
Any advice appreciated, thanks
MrB