Is there a way to customise the hostname shown in the line: X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on somehost.someprovider.com
So that it reads: X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on mail.mydomain.ch I understand that I could change the hostname of the host itself, but I would prefer not to do that. (The host might be used for other things than mail, I may not want to have a mail domain as the hostname.) Other mail software that I use does have such settings. For example, Postfix will use its ‘myhostname’ setting when generating the Received header. The milters that I use also have similar settings or will fall back to the hostname setting from Postfix.
