Issue #17049 has been reported by Nestorfish (Christophe Le Roy).

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Bug #17049: Net::IMAP - Handling of NOOP untagged responses sent by Zimbra
https://bugs.ruby-lang.org/issues/17049

* Author: Nestorfish (Christophe Le Roy)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-darwin17]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
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Zimbra server sends invalid untagged responses to prevent some clients from disconnecting during long-running requests.
As they are invalid, they raise an exception in Net::IMAP, while they could be clearly identified and safely ignored.

I have opened an issue on net-imap GitHub repository, along with a pull request (https://github.com/ruby/net-imap/issues/2 and https://github.com/ruby/net-imap/pull/3), but it seems I should have reported the issue here.

Can we have a look to these ?



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