Man pages matching name encode::imaputf7 in section 3pm:

Encode::IMAPUTF7.3pm.en	debian 10 / libencode-imaputf7-perl
Encode::IMAPUTF7.3pm.en	debian 11 / libencode-imaputf7-perl
Encode::IMAPUTF7.3pm.en	debian 12 / libencode-imaputf7-perl