https://dovecot.org/list/dovecot/2014-October/098087.html
GETMETADATA UTF8 encoding of folder names instead of UTF7
utf8encodingfoldernamesinstead
https://www.php.net/manual/es/function.imap-utf7-decode.php
PHP: imap_utf7_decode - Manual
Decodifica una cadena codificada en UTF-7 modificado
phpimaputf7decodemanual
https://www.php.net/manual/de/function.imap-utf7-encode.php
PHP: imap_utf7_encode - Manual
Kodiert ISO-8859-1 Text im modifizieren UTF-7-Format
phpimaputf7encodemanual
https://www.php.net/manual/en/function.imap-utf7-encode.php
PHP: imap_utf7_encode - Manual
Converts ISO-8859-1 string to modified UTF-7 text
phpimaputf7encodemanual
https://www.php.net/manual/pt_BR/function.imap-utf7-encode.php
PHP: imap_utf7_encode - Manual
Converte string ISO-8859-1 em texto UTF-7 modificado
phpimaputf7encodemanual