8BITMIME Check Cannot Be Disabled

SUMMARY

When a Microsoft Commercial Information Server (MCIS) 2.0 Mail SMTP server sends mail that includes 8-bit content, it checks to verify that the receiving server supports the 8-bit-MIME transport extension. If it does not support this extension, the message is rejected, and a non-delivery report (NDR) is sent back to the originator. MCIS 2.0 Mail, supports the 8-bit-MIME extension as described in RFC 1652 "Service Extension for 8-bit-MIME transport." This RFC specifies that when an SMTP host wants to submit a message with 8-bit content, it should check for the 8BITMIME keyword in the response to the EHLO command. If this keyword is not present, the message should be returned to the originator.

In MCIS 2.0 Mail, this check for the 8BITMIME keyword cannot be disabled.