How to change random domains to a simple domain using Notepad++

Question

I have a file with a random domains like this:

    host-name                           estkowjf.tradicebk.cz
    domain-key                          smtp,*,/home/pmta/keys/dkim.pem
</virtual-mta>
    host-name                           itaquearuem.tradicebk.cz
    domain-key                          smtp,*,/home/pmta/keys/dkim.pem
</virtual-mta>
    host-name                           inventorecnjof.tradicebk.cz
    domain-key                          smtp,*,/home/pmta/keys/dkim.pem

I need to replace xxxx.tradicebk.cz with a simple domain like so:

    host-name                         mydomain.com
    domain-key                          smtp,*,/home/pmta/keys/dkim.pem
</virtual-mta>
    host-name                           mydomain.com
    domain-key                          smtp,*,/home/pmta/keys/dkim.pem
</virtual-mta>
    host-name                           mydomain.com
    domain-key                          smtp,*,/home/pmta/keys/dkim.pem

How I can do that?

Answer 1

• Ctrl+H
• Find what: host-name\h+\K\S+
• Replace with: mydomain.com
• CHECK Match case
• CHECK Wrap around
• CHECK Regular expression
• UNCHECK . matches newline
• Replace all

Explanation:

host-name       # literally
\h+             # 1 or more horizontal spaces
\K              # forget all we have seen until this position
\S+             # 1 or more non-space characters

Screenshot (before):

Screenshot (after):

Answer 2

You can do something like that :

[a-z]+.tradicebk.cz