Update app tracking hints

json/app_tracking_hints.json

@@ -2334,6 +2334,19 @@
     "tag_regex": "(?i)(?:v|release[-_/]?)?(\\d+(?:\\.\\d+){1,3}(?:[-+._][0-9A-Za-z.-]+)?)",
     "website": "https://github.com/s1t5/mail-archiver"
   },
+  "mailpit": {
+    "default_ports": [
+      8025
+    ],
+    "file_path": "/root/.mailpit",
+    "file_regex": "(?i)(?:v|release[-_/]?)?(\\d+(?:\\.\\d+){1,3}(?:[-+._][0-9A-Za-z.-]+)?)",
+    "github_source": "releases",
+    "installed_via": "file",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/mailpit.webp",
+    "repo": "axllent/mailpit",
+    "tag_regex": "(?i)(?:v|release[-_/]?)?(\\d+(?:\\.\\d+){1,3}(?:[-+._][0-9A-Za-z.-]+)?)",
+    "website": "https://mailpit.axllent.org/"
+  },
   "maintainerr": {
     "default_ports": [
       6246