How do I set up Anti-Spoofing in Mimecast?
To set up an Anti-Spoofing policy in Mimecast, create a policy that protects your sending domain (your From email addresses) from spoofed emails. As part of this setup, whitelist the IP addresses used by Vtiger to ensure that genuine emails are not blocked. Click here to learn more about setting up Anti-Spoofing in Mimecast.