Anti Spam service not working - Email Flow blocked
03/26/2020 142 8136
When CASS Cloud Service IP address resolves as 188.8.131.52, no emails are being received. You may get an intermittent telnet response as "421 4.4.5 Service not available, too many connections".
When this IP is used, the Anti-spam | Status page may change status to Unknown.
For status updates regarding this event please see status.sonicwall.com.
As a workaround, please apply the following:
- Change the CASS Cloud Service Address to use the Static Address 184.108.40.206 by going to the diag page of your SonicWall (https://SonicWall_URL/diag.html):
- Enable the option "Disable SYN Flood Protection for Anti-Spam-related connections" on the DIAG page.
NOTE: This change requires a firewall restart.
CAUTION: This is only a temporary workaround until the issue is resolved.
If the issue persists after applying these changes, please contact our Support to get assistance.
There are two ways to contact technical support:
1. Online: Visit mysonicwall.com. Once logged in select Resources & Support | Support | Create Case.
2. By phone: please use our toll-free number at 1-888-793-2830. Please have your SonicWall serial number available to create a new support case.
If you do not have a mysonicwall.com account create one for free!