[Feature] Use of an additional (configurable) delimiter

[MrHappy]

Summary

I would like to have the use of an additional delimiter available.

Motivation

I have noticed several shops/forums don't accept a plus ( + ) in an emailaddress, but do an underscore ( _ ). From what I understood at this moment rspamd has the ability to use one delimiter (+) and this is not configurable. Adding the _ (or a configurable delimiter) would give me (and possibly others) the possibility to make use of tags on website where a plus is not accepted. I noticed the use of _ as a delimiter works, except (for as far as I could tell) when rspamd marks a mail as spam. Than there appears not have been sent a notification mail and also the mail does not show in quarantine.

Describe alternatives you've considered

If this functionality is available I didn´t find it...

Additional context

Add any other context about the feature request here. Not that I'm aware of.

[dragoangel]

You use rspamd for inbound emails? If you put there delimiter as _ it will treat real email as email with tag

[MrHappy]

@dragoangel I do, but I do not get what you mean with 'there'. Where would that be?

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[MrHappy]

I would like to have more than one delimiter. I.e. a '+' and '_'.