Preventing DDOS attacks

[Ajo Jose]

Hi Team,

can we prevent senders from sending more than 20 emails to our domain a day to prevent any possible attacks?

[David Amos]

I think your best option on this is too look at a service like mimecast in front of Google Workspace, or if you have Trend WFBS use their email protection/protection form your AV vendor, as most will have something for these.

Limiting emails does not always work, especially if you have a large chain email on the go etc...

Kind Regards

Dave

[Ajo Jose]

Hi David,

Thanks

[Patrick Haley]

Don't forget to set up DMARC. We recently updated our policies following Google's recommended rollout and cut back our spam significantly. https://support.google.com/a/topic/2759254?hl=en&ref_topic=9061731&fl=1 

For monitoring DMARC reports during rollout I use https://powerdmarc.com/ which was great for identifying all the services trying to send emails from our domain before fully applying the policy. 

Feel free to reach out if you need any help.