I have tried 2 different IMAP server, let s call it A and B.

ODOO works fine with A server IMAP .

works fine with B server POP .

If set B server with IMAP , when fetching email , following message get from mail server:

Invalid message set. Command should be '<tag> SEARCH <search term>'

Seems the server can not recognize the term of  search command  sent from ODOO.

How can i find what happen between ODOO and B server?

I can see the conversation in wireshark, but there are encrypted message, i dont know what command has been sent to mail server, and this server dont support IMAP without SSL/TLS.