Encode::IMAPUTF7 is a perl module for modification of UTF-7 encoding
for IMAP.

IMAP mailbox names are encoded in a modified UTF7 when names contains
international characters outside of the printable ASCII range. The
modified UTF-7 encoding is defined in RFC2060 (section 5.1.3).

WWW: http://search.cpan.org/dist/Encode-IMAPUTF7/