[GH-ISSUE #410] Tagging filters with regex support #266

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opened 2026-03-15 13:32:40 +03:00 by kerem · 2 comments

kerem commented

2026-03-15 13:32:40 +03:00

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Originally created by @stefankluempers on GitHub (Dec 14, 2024).
Original GitHub issue: https://github.com/axllent/mailpit/issues/410

We use a central Mailpit instance to support various projects. Each project uses a project-specific mail domain.
It would be very helpful if automatic tagging based on the mail domain could be configured. Can the filter definition be extended to include regex support with matching groups for tag definition?

To use the local part or mail domain for tag definition, the configuration could be as follows, for example:
filters:

  - match: addressed:(.*)@example.com
    tags: Tag $1
  - match: from:from@(.*).com
    tags: Tag $1, $1

Originally created by @stefankluempers on GitHub (Dec 14, 2024). Original GitHub issue: https://github.com/axllent/mailpit/issues/410 We use a central Mailpit instance to support various projects. Each project uses a project-specific mail domain. It would be very helpful if automatic tagging based on the mail domain could be configured. Can the filter definition be extended to include regex support with matching groups for tag definition? To use the local part or mail domain for tag definition, the configuration could be as follows, for example: filters: ``` - match: addressed:(.*)@example.com tags: Tag $1 - match: from:from@(.*).com tags: Tag $1, $1 ```

kerem closed this issue

2026-03-15 13:32:45 +03:00

kerem commented

2026-03-15 13:32:51 +03:00

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@axllent commented on GitHub (Dec 14, 2024):

Hi @stefankluempers. No, unfortunately this is not possible. The tag matches are ultimately mapped to internal SQL queries, so regex is not supported.

As a suggestion, you could configure your projects to add an X-Tags header to the emails they send.

@axllent commented on GitHub (Dec 14, 2024): Hi @stefankluempers. No, unfortunately this is not possible. The tag matches are ultimately mapped to internal SQL queries, so regex is not supported. As a suggestion, you could configure your projects to add an [X-Tags header](https://mailpit.axllent.org/docs/usage/tagging/#x-tags-header) to the emails they send.

kerem commented

2026-03-15 13:32:56 +03:00

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@stefankluempers commented on GitHub (Dec 14, 2024):

Hi Ralph, thanks for your quick response. X-Tags headers seam to be a good alternative to my suggestion.

@stefankluempers commented on GitHub (Dec 14, 2024): Hi Ralph, thanks for your quick response. X-Tags headers seam to be a good alternative to my suggestion.

kerem referenced this issue

2026-03-15 14:22:20 +03:00

[PR #266] [CLOSED] Chore(deps): Bump follow-redirects from 1.15.5 to 1.15.6 #499