diff --git a/tests/README.md b/tests/README.md
index e2bfa6b..039c65b 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -16,6 +16,16 @@ docker-compose up
     - lient on :143, run `nc 127.0.0.1 143`
     - login with `A LOGIN test pass`
 
+Other IMAP servers we could add:
+  - WildDuck (own node.js imap implementation)
+    - https://github.com/nodemailer/wildduck
+  - DBMail (own C IMAP implementation)
+    - https://github.com/dbmail/dbmail/tree/master
+  - UW IMAP (known to be the reference IMAP implementation)
+    - https://wiki.archlinux.org/title/UW_IMAP
+  - Apache James (has its own implementation of IMAP too)
+    - https://james.apache.org/
+
 # Inject emails and dump the computed `BODY` + `BODYSTRUCTURE`
 
 Once you ran `docker-compose up`, launch `./send-to-imap.py`