Msexchange, nomsexchange Channel Options

Microsoft Exchange gateway channels
The  channel option may be used on  TCP/IP channels  to tell the MTA that this is a channel that communicates with Microsoft® Exchange gateways and clients. Use of the option tells the MTA to try and accomodate nonstandard behavior on the part of Microsoft Exchange. Exactly what nonstandard behaviors are dealt with is subject to change.

Currently the  channel option on a channel configured to allow TLS use (see the   channel options) causes advertisement (by the MTA&#x27;s SMTP server) and recognition (by the MTA&#x27;s SMTP client) of the non-standard TLS capability string, in addition to the standard STARTTLS capability string, to indicate that TLS is supported.

New in 7.0.5, setting  on a destination channel will  cause the MTA, if performing any sort of MIME processing operation, to remove any Content-disposition: header line from any text/calendar message parts, as despite Content-disposition:&#x27;s long-standing existence as a standardized header line, not to mention the basic MIME rule that unrecognized Content-&#x2a; header lines should be ignored, Microsoft® Outlook&#x27;s handling of text/calendar parts is disturbed when such parts have a Content-disposition: specified. So specifying  on a channel sending to Microsoft Exchange,  if text/calendar parts will flow through that channel,  should allow Microsoft Outlook to process calendar parts more successfully.

is the default.

See also:
 * maytls Option
 * TCPIP channels
 * TLS and SASL channel options
 * Attachments and MIME processing channel options
 * SMTP and LMTP protocol channel options
 * Channel options