Operation timed out after 5000 milliseconds

Hoi Peter,

today I got 4 messages like this one:

Operation timed out after 5000 milliseconds with 0 bytes received

The mail subject was “[domain.com] AVH First Defense Against Spam – Error reporting spammer”

Any idea what happens here?

Thanks Olaf

https://wordpress.org/plugins/avh-first-defense-against-spam/