I am a developer and I support an application that sends out emails to approx. 900 subscribers everyday. The emails contain article titles and briefs, and the subscribers can click the links to go to the web and read the full articles. It is an ASP application on NT (v4 svc pack 6a) using CDONTS to send the mail. We use Exchange Server 5.5 on NT, and our clients are Outlook 2000. From the web server (IIS v4), the mail is sent to a “hub” Exchange server that does load balancing and forwards it to the least busy Exchange Server for processing.
The ASP code sets the MailFormat and BodyFormat to 0, so the emails should be in HTML format. However, on somedays and to some subscribers, the emails are in plain text format. Two people can have the same content on the same day, and one sees it in HTML, the other in plain text. The same person can receive HTML format one day, and plain text the next.
My Exchange support is telling me the problem is the application, but I can’t see anything in the application that would cause the on-again-off-again format issue. I believe the problem is on a server. Any ideas?
