**Backport:** https://codeberg.org/forgejo/forgejo/pulls/9074
When registering with an email account including a comment (e.g. `me@example.com (a comment here)`), the comment is removed from the email address. It was possible to include an email address in the comment to bypass the block list. For instance if registering with `me@evilcorp.com (me@example.com)` the mail would incorrectly be verified against the block list using the comment instead of `@evilcorp.com`. This is a regression introduced in Forgejo v12.
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## Release notes
<!--URL:https://codeberg.org/forgejo/forgejo-->
- Security bug fixes
- [PR](https://codeberg.org/forgejo/forgejo/pulls/9074): <!--number 9074 --><!--line 0 --><!--description ZW1haWwgY29tbWVudHMgYXJlIHJlbW92ZWQgZnJvbSBlbWFpbCBhZGRyZXNzZXM=-->email comments are removed from email addresses<!--description-->
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Co-authored-by: famfo <famfo@famfo.xyz>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9083
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
The current email restrictions were put in place because of a security issue with sendmail (https://github.com/go-gitea/gitea/pull/17688). Remove this restriction and instead ensure that this security issue cannot happen with sendmail.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7829
Reviewed-by: Ellen Εμιλία Άννα Zscheile <fogti@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: famfo <famfo@famfo.xyz>
Co-committed-by: famfo <famfo@famfo.xyz>
## Description
This addresses Issue #5379.
The email validation was extended.
Additionally to checking whether the email domain is in the block list or in the allow list now we also check if the email domain is the servers own FQDN.
Tests have been written for the correct function of the allow list and if the local FQDN is admitted as email domain.
Edit: Clarifications, Typos
## Checklist
The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).
### Tests
- I added test coverage for Go changes...
- [x] in their respective `*_test.go` for unit tests.
### Documentation
- [x] I did not document these changes and I do not expect someone else to do it.
### Release notes
- [x] I want the title to show in the release notes with a link to this pull request.
Co-authored-by: Michael Jerger <michael.jerger@meissa-gmbh.de>
Co-authored-by: patdyn <erik.seiert@meissa-gmbh.de>
Co-authored-by: Mirco <mirco.zachmann@meissa.de>
Co-authored-by: jerger <jerger@noreply.codeberg.org>
Co-authored-by: zam <mirco.zachmann@meissa.de>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/5393
Reviewed-by: jerger <jerger@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: patdyn <patdyn@noreply.codeberg.org>
Co-committed-by: patdyn <patdyn@noreply.codeberg.org>
