Various smtpdummy fixes

config/scripts/smtpdummy

@@ -9,7 +9,6 @@ import io
 import pprint
 import subprocess
 import sys
-import uuid
 
 
 if __name__ == "__main__":
@@ -34,6 +33,7 @@ if __name__ == "__main__":
     )
 
     parser.add_argument("-l", "--helo", env_var="HELO")
+    parser.add_argument("-L", "--helo-verb", env_var="HELO_VERB", default="EHLO")
     parser.add_argument(
         "-s", "--sender", env_var="SENDER", default="geoffrey@frogeye.fr"
     )
@@ -79,11 +79,11 @@ if __name__ == "__main__":
     if args.to is None:
         args.to = args.receiver[0]
     if args.reply_to is None:
-        args.reply_to = args.to
+        args.reply_to = getattr(args, 'from')
     if args.password:
         password = args.password
         args.password = "********"
-    mid = f"{uuid.uuid1()}@{args.helo}"
+    mid = email.utils.make_msgid(domain=args.helo)
 
     # Transmission content
 
@@ -190,7 +190,7 @@ Input arguments:
 
     if args.security != "starttls":
         recv()
-    send(f"EHLO {args.helo}")
+    send(f"{args.helo_verb} {args.helo}")
     if args.user:
         encoded = base64.b64encode(
             args.user.encode()
@@ -200,9 +200,9 @@ Input arguments:
             + password.encode()
         ).decode()
         send(f"AUTH PLAIN {encoded}")
-    send(f"MAIL FROM: <{args.sender}>" + (" SMTPUTF8" if args.smtputf8 else ""))
+    send(f"MAIL FROM:<{args.sender}>" + (" SMTPUTF8" if args.smtputf8 else ""))
     for receiver in args.receiver:
-        send(f"RCPT TO: <{receiver}>")
+        send(f"RCPT TO:<{receiver}>")
     if not args.callout:
         send("DATA")
         send(text)