I am uploading a NMU to DELAYED/10 in order to fix this.
The debdiff is attached.
diff -Nru dovecot-antispam-2.0+20171229/debian/changelog
dovecot-antispam-2.0+20171229/debian/changelog
--- dovecot-antispam-2.0+20171229/debian/changelog 2024-06-27
20:46:17.000000000 +0000
+++ dovecot-antispam-2.0+20171229/debian/changelog 2024-06-27
20:43:53.000000000 +0000
@@ -1,3 +1,10 @@
+dovecot-antispam (2.0+20171229-1.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Convert to source format 3.0. Closes: #1007291
+
+ -- Bastian Germann <[email protected]> Thu, 27 Jun 2024 20:43:53 +0000
+
dovecot-antispam (2.0+20171229-1) unstable; urgency=medium
* Support for dovecot 2.3 changes.
diff -Nru dovecot-antispam-2.0+20171229/debian/source/format
dovecot-antispam-2.0+20171229/debian/source/format
--- dovecot-antispam-2.0+20171229/debian/source/format 1970-01-01
00:00:00.000000000 +0000
+++ dovecot-antispam-2.0+20171229/debian/source/format 2024-06-27
20:43:42.000000000 +0000
@@ -0,0 +1 @@
+3.0 (quilt)
