Blocking spam using a regular expresion

[nicojijiji]

Hi there! I have several spam incoming that i would like to block. I keep adding them to blacklist but they always change their domain server. As its showed in the pictures, they email addresses always start with the same expresion like "citacion***@**" or "factura***@**" . How should a define a rule to block every email that has any of that expresions?
Thanks!

 

[nicojijiji]

Hi there! I have several spam incoming that i would like to block. I keep adding them to blacklist but they always change their domain server. As its showed in the pictures, they email addresses always start with the same expresion like "citacion***@**" or "factura***@**" . How should a define a rule to block every email that has any of that expresions?
Thanks!
View attachment 56803View attachment 56804

is this regular expresion good enough to block all emails starting with "citacion"?
^.+\.citacion$