This domain belongs to Presscloud, a PR platform. Our server verify.presscloud-verify.com checks whether journalists' email addresses still exist, so press releases don't bounce.
It opens a short SMTP session (EHLO, MAIL FROM, RCPT TO, QUIT) and never sends a message. Each mail server gets at most one session at a time and 6 per minute.
Want your domain excluded, or seeing a problem? Email abuse@presscloud-verify.com and we'll take care of it.