ASSESS results explained

Understand what the results you receive from the ASSESS API services mean

The table explains the results received from the ASSESS API service:

Hippo Trust Score

How much can I trust the user?

Typically scores less than 3 should be blocked, 7 or higher admitted and the remainder reviewed. (Score ranges should depend on use cases.) 

Gibberish and profanity status

Is there gibberish text?

Is there profanity?


The gender been identified from the first name or email address.

Email address verification result

Primary result codes of OK, Bad, Unverifiable, Disposable email address.

Role and subaddressing status

Is a role address? e.g. info@, sales@, postmaster@

Does the email contain subaddressing i.e. + some text?

Mail server location and infrastructure

Is email address a free mail provider? e.g. gmail, hotmail etc

Is the mail server a catch all mail server?

Infrastructure identifier e.g. Hotmail, GoogleforBiz, Office365, Mimecast.

Mail server location as a two digit ISO code e.g. US.

Consumer Business assessment

Does the email address belong to a consumer or a business? 

The closer the score is to 0 the more likely the email address belongs to a consumer, the closer it is to 10 the more likely it is to belong to a business.


Is there a presence on a reputable block list?

Dark Web status

Is there an association with the Dark Web?

Domain status

Does the domain have any DNS records?

Does the domain have any MX records?

Domain age

Age of the domain.

Domain registration

City and country of registration.

IP location

Coordinates, city, country.

Connection type

The connection type e.g. Corporate, Residential.

The table explains the email address verification results in more detail:

Main Response Codes Additional Status Codes                Explanation 
Ok Success A valid email address
Bad DomainDoesNotExist The domain of the email address does not exist. 
EmailAddressFoundOnBlockLists The email address is found on one or more block lists.
EmailContainsInternationalCharacters Email address contains international characters.
InvalidEmailFormat Invalid email address format.
MailboxDoesNotExist The mailbox does not exist.
MailboxFull Mailboxes that are full are unable to receive any further email messages until such time as the user empties the mail box or the system administrator grants extra storage quota.
MailServerFaultDetected An unspecified mail server fault was detected.
NoMailServersForDomain There are no mail servers defined for this domain, according to DNS.
Possible spam trap detected A possible spam trap email address or domain has been detected. 
Disposable email address DomainIsWellKnownDea The domain is a well known Disposable Email Address 
Unverifiable MailServerAntiSpam The email server is using anti-spam measures. 
MailServerGreyListing The email server is employing greylisting. For more information, visit
MailServerCatchAll The server accepts any email address as long as the domain is correct. 
None No additional information is available.
Timeout The remote email server timed out. Mail server is too busy / overloaded, misconfigured, offline or otherwise unavailable.
UnpredictableSystem Unpredictable system infrastructure detected. Various email services deliver unpredictable results to email address verification.