Man pages matching name mail::imapclient::thread in section 3pm:

Mail::IMAPClient::Thread.3pm.en	debian 10 / libmail-imapclient-perl
Mail::IMAPClient::Thread.3pm.en	debian 11 / libmail-imapclient-perl
Mail::IMAPClient::Thread.3pm.en	debian 12 / libmail-imapclient-perl