- Plesk for Linux
- Plesk for Windows
What are spam outbound protection general recommendations?
How to prevent outbound spam?
Use SpamExperts Email Security extension as the most powerful tool against spam.
This is the recommended solution by Plesk and Here are the instructions on how to install it.
Additional manual actions
Log into Plesk.
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:
Additionally, the following can be checked: Protection from Outbound Spam