bpo-136134: Clarify comment on handling unsupported hash in CRAM-MD5

Author: nogueira-raphael

Lib/smtplib.py

@@ -752,7 +752,7 @@ def login(self, user, password, *, initial_response_ok=True):
                 last_exception = e
             except SMTPAuthHashUnsupportedError as e:
                 # Some environments (e.g., FIPS) disable certain hashing algorithms like MD5,
-                # which are required by CRAM-MD5. This raises a ValueError when trying to use HMAC.
+                # which are required by CRAM-MD5. This raises a SMTPAuthHashUnsupportedError when trying to use HMAC.
                 # If this happens, we catch the exception and continue trying the next auth method.
                 last_exception = e
                 continue