The number of connections refers to limits on the number of messages and connections that an email server can process. The rate considers message processing rates, SMTP connection, and SMTP session timeout. The limits work together to protect an email server from being overwhelmed by accepting and delivering messages.
Back to Glossary
Do you want to remove your IP/domain from one of our blocklists?
Please use our lookup-service and follow the instructions there in order to get that resolved.