SymptomsThere is a bug in SMTP which is a part of IIS 6.0: in some cases SMTP sends a notification to a customer but returns an error code to PBA. PBA processes this situation as if a problem occured while sending a notification and tries to resend it. At that SMTP again sends out the same notification and returns an error and so on. As a result a customer receives multiple identical notifications.
Note: The issue was detected on IIS 6.0. Other versions of IIS were not tested.
1. Using another mail server (for example, Microsoft Exchange Server)
2. Modification of notification settings on PBA side by setting the maximum number of attemplts to send an email equal to 1 (beginning with 4.4.1 version of PBA).
It can be done the following way:
- Go to Communication Director > Notification manager > Notification Settings and set 'Max tries to resend message' parameter to 1.
Or you may execute the command below in the database:
update CBNotifSettings set MaxResendTry=1;