Using System.Net.Mail with Antivirus Software ...

Hello,
        I am creating an application that sends messages using the 
System.Net.Mail class and I am running into a problem with Antivirus 
software delaying messages. If I disable the e-mail protection features of

the anti-virus software the messages are delivered with no problems but if

the aniti-virus software's e-mail protection features are enabled the 
messages are either delayed for 1 or more minutes or the messages only get

delivered when the application is closed. Is there a way I can work with
the 
System.Net.Mail class to send messages that will work well.
    It's just that I would like to code my applications so that they will 
play well with anti-virus software that is installed on client computer 
systems.
    Thank you very much for your time.
Regards,
Christopher Koeber