Not quite sure that this is a right place to ask this question, if it is not i appreciate it if you can direct me to a right discussion group.We are using MailMessage class in System.Net.Mail. We have no attachment, no alert, and it is just a simple email with TO, CC, Subject Line, and HTML Body. The email component hosted on a WCF Service.Our end-users are reporting that sometimes their Subject Line of their message is encoded to BASE64. We use the exact same email body and subject line and try to repro the problem, on same the exchange server, and so far we were unable to do so.Unfortunately due to the sensetivity of the email content, I am not able to share that with you.Do you guys have any idea why this happens? Any help/advice would be appreciated.Many thanks.

On Thu, 7-Jan-10 20:26:27 GMT, SushiPour wrote:>Not quite sure that this is a right place to ask this question, if it is not i appreciate it if you can direct me to a right discussion group.We are using MailMessage class in System.Net.Mail. We have no attachment, no alert, and it is just a simple email with TO, CC, Subject Line, and HTML Body. The email component hosted on a WCF Service.Our end-users are reporting that sometimes their Subject Line of their message is encoded to BASE64. We use the exact same email body and subject line and try to repro the problem, on same the exchange server, and so far we were unable to do so.Unfortunately due to the sensetivity of the email content, I am not able to share that with you.Do you guys have any idea why this happens? Any help/advice would be appreciated.Many thanks. How about just a guess? Does the subject contain non-ASCII characters?Anything with a decimal value less than 32 or greater than 127 mightbe your problem.---Rich MatheisenMCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Thanks for the reply.No i don't think any special character is the problem. Since the problem is intermittent, and the same sometimes go through.