What Is the Email Sending Limit? How Do I Set It in Plesk?

The sending limit is the maximum number of emails an account or domain can send in one hour. Limits stop a hacked account from sending spam and keep the server IP address off blacklists.

Setting limits on your own server (VDS)

If you have a VDS or dedicated server with Plesk, you can set the limits yourself:

1. Log in to Plesk as administrator (admin).
2. Go to Tools & Settings > Mail Server Settings and find the Outgoing Mail Control section.
3. Tick Enable limitations on outgoing email messages and enter the hourly limits per mailbox, per domain and per subscription.
4. Click OK. A different limit for a specific subscription can be set on that subscription's Mail Settings page.

What happens when the limit is reached?

My emails are not going out

Wait an hour and try again. If the limit fills up even though you are not sending, your account may be hacked; change your password at once and open a support ticket.

My forms send a lot of email

Form spam quickly fills the limits. Add reCAPTCHA to your forms.

For other sending errors: I cannot send email: common errors