The specified email address uses lists.alioth.debian.org. That system was migrated to a separate debian.net system run by DDs. Teams were encouraged to migrate to the new system, but they are also free to use the old address going forward if they like.
For further information, please consult the Debian Wiki.
For more information please consult:
The tag is present in Lintian version
That is the most recent version we know about.
We use semantic versions.
The patch number is a commit step indicator relative to the
release tag in our Git
You can find the detection logic for this version at commit ce6249d. For merge requests, please use the latest version in the Lintian check fields/mail-address.
This is a classification. There is no issue with your package.