ABOUT THIS DOMAIN AND SMTP ACTIVITY
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The email address info (at this domain) from host torosaurus.optimaize.com is used to verify email addresses for our customers when processing online orders to prevent fraud. New orders are validated to detect and flag or filter malicious orders, and to decide which payment methods are offered (invoice, prepayment, ...).

HOW IT WORKS
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Technically it is performed similar to other such email verification services as found on the internet:
  1. syntax validation on email address
  2. checking dns of email domain
  3. looking up mx records
  4. asking the mail server
No email is sent, the connection gets closed (clean quit) before sending data. Our SMTP code plays nice and adheres to the RFC to our best knowledge. Tight request limits per domain and per mail server are in place.

NO SPAM, NO DICTIONARY ATTACK
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If you are reading this, then our activity may have shown up on your radar. We are sorry about that. Again, we do not send out any emails, we don't bother your users. Also, our pay-per-use service is too expensive to be abused as a dictionary attack against your mail server, and the configured limits per domain are way too tight.

DON'T LIKE IT?
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If you're a mail server admin, and don't like this activity on your mail server, please send us a note to info at with your email domain name(s) and or mail server address(es), and we'll promptly exclude you. If your domain is excluded from the existence check, the addresses will be marked as UNKNOWN. This results in a neutral rating (neither downgrading for inexistence, nor positive points for confirmed existence).