Timeouts on rt-mailgate

Sorry if this is a little bit off-topic, but does anyone know how to
increase the timeout on sendmail forward processing? I have something
that mails tickets, with large attachments, into rt-mailgate and,
although the tickets are getting created, the sendmail run exits with
EX_TEMPFAIL. I’m pretty sure it’s because the ticket creation isn’t
getting done before sendmail times out the delivery.
Thanks in advance.

Alan Sparks, UNIX/Linux Systems Integration and Administration