Patch #1075928: AUTH PLAIN in smtplib.

smtplib can not log in to some server using command AUTH PLAIN, it sends
``user\0user\0pass'' to the server, but ``\0user\0pass'' has better
compatibility.

diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index 2e124838850f0bac1979257343540bbf4c3a8012..368aa8dc6a09398b4a29dcd83e998eb563b9d937 100755 (executable)
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -530,7 +530,7 @@ class SMTP:
             return encode_base64(response, eol="")
 
         def encode_plain(user, password):
-            return encode_base64("%s\0%s\0%s" % (user, user, password), eol="")
+            return encode_base64("\0%s\0%s" % (user, password), eol="")
 
 
         AUTH_PLAIN = "PLAIN"