Exchange - Dequeue

What if my ISP uses post.office?

Software.com publishes an SMTP mailer product called Post.Office that runs on Unix and Windows NT. Recent improvements to the product have added an option to make this a workable solution for Exchange dial-up as well:

1. ETRN - Microsoft Exchange version 5.0 SP1 and later implements the ETRN command to cause mail for a particular domain(s) to dequeue.
   Post.Office 3.0 and above support ETRN functionality.
2. QSND