Prerequisites IDN

Make sure you have met the following prerequisites before you use the Internationalised Domain Names (IDN) feature:

• All incoming messages must have IDNs encoded in UTF-8.

  For Example: An MTA that sends messages to the email gateway must support IDNs and make sure the domains in the messages are in the UTF-8 format.

• All outgoing messages must have IDNs encoded in UTF-8, and the destination server must accept and support IDNs accordingly.

  For Example: An MTA that accepts messages from the email gateway must support IDNs and domains encoded in the UTF-8 format.

• In all applicable DNS records, IDNs must be configured using the Punycode format

  For Example: When you configure an MX record for an IDN, the domain in the DNS record must be in the Punycode format.