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-rw-r--r--Lib/email/generator.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/email/generator.py b/Lib/email/generator.py
index 510f68b..9d33f1c 100644
--- a/Lib/email/generator.py
+++ b/Lib/email/generator.py
@@ -226,7 +226,8 @@ class Generator:
# Create a boundary that doesn't appear in any of the
# message texts.
alltext = self._encoded_NL.join(msgtexts)
- msg.set_boundary(self._make_boundary(alltext))
+ boundary = self._make_boundary(alltext)
+ msg.set_boundary(boundary)
# If there's a preamble, write it out, with a trailing CRLF
if msg.preamble is not None:
self.write(msg.preamble + self._NL)