[3.15] gh-108280: Give a meaningful error for an invalid imaplib greeting (GH-152768)#152856
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serhiy-storchaka merged 1 commit intoJul 2, 2026
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…ing (pythonGH-152768) Connecting to a server that does not send a valid IMAP4 greeting, such as a POP3 server answering on the IMAP port, failed with the unhelpful "imaplib.IMAP4.error: None". A meaningful message is now raised instead. (cherry picked from commit 262b6a0df5a325e788928ab0cd514fa4786571b4) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Connecting to a server that does not send a valid IMAP4 greeting, such as
a POP3 server answering on the IMAP port, failed with the unhelpful
"imaplib.IMAP4.error: None". A meaningful message is now raised instead.
(cherry picked from commit 262b6a0)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com
Co-authored-by: Claude Opus 4.8 (1M context) noreply@anthropic.com
imaplib.IMAP4.error: None#108280