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-rwxr-xr-xLib/smtpd.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/smtpd.py b/Lib/smtpd.py
index 4aa3476..e09774f 100755
--- a/Lib/smtpd.py
+++ b/Lib/smtpd.py
@@ -237,7 +237,7 @@ class SMTPChannel(asynchat.async_chat):
if not self.__mailfrom:
self.push('503 Error: need MAIL command')
return
- address = self.__getaddr('TO:', arg)
+ address = self.__getaddr('TO:', arg) if arg else None
if not address:
self.push('501 Syntax: RCPT TO: <address>')
return