- Plesk for Linux
- Plesk for Windows
What are spam outbound protection general recommendations?
How to prevent outbound spam?
Remove 127.0.0.0 / 32 via the tab Plesk > Tools & Settings > Mail Server Settings > White List.
Configure Outgoing Mail Limits to prevent users from sending messages in bulk: How to set limitations on outgoing email messages in Plesk
- In case of spam is being sent using php scripts, please check following article:
- Set more secure passwords for all mail accounts.