Leadspace partners with a third-party vendor to provide email validation on lead and contact records you send for Enrichment. When you send an email address in your request, our validation service will ping the SMTP server and provide one of four different statuses in the LS Original Email Verification Status field.
There are also Email Verification Sub Status fields available for customers using our full v4 datasat (New Leadspace Universal Graph) that gives details into why we returned a specific status. The Sub Status values are numbered on the Invalid and Unknown status values:
Valid
Genuine emails, aliases, alternate emails
Invalid
These are the emails that we determined to be invalid. Please delete them from your email list. The email can be deemed invalid for various reasons, such as “mailbox not found.” The address also may not accept emails.
- Does_not_accept_mail - (invalid) These domains only send mail and don't accept it.
- Failed_syntax_check - (invalid) Emails that fail RFC syntax protocols.
- Possible_typo - (invalid) These are emails belonging to commonly misspelled popular domains.
- Mailbox_not_found - (invalid) These emails addresses are valid in syntax, but do not exist.
- No_dns_entries - (invalid) These emails are valid in syntax, but the domain doesn't have any DNS records or incomplete DNS Records. Therefore, mail programs will have difficulty delivering emails to them or be entirely unsuccessful.
- Mailbox_quota_exceeded - (invalid) These addresses exceeded their space quota and no longer accept emails (temporarily).
- Unroutable_ip_address - (invalid) These email domains point to an unroutable IP address.
Unknown
We couldn’t validate for one reason or another. Typical cases include an offline mail server or an anti-spam email system. In most cases, 80% of unknowns are invalid/bad email addresses.
- Antispam_system - (unknown) These emails have anti-spam systems deployed that are preventing us from validating these emails.
- Exception_occurred - (unknown) These emails caused an exception when validating. If this happens repeatedly, please let us know.
- Failed_smtp_connection - (unknown) These emails belong to a mail server that won't allow an SMTP connection. Most of the time, these emails will end up being invalid.
- Forcible_disconnect - (unknown) These emails belong to a mail server that disconnects immediately upon connecting. Most of the time, these emails will end up being invalid.
- Greylisted - (unknown) Greylisting technology is temporarily preventing the validation attempt. If you resubmit these emails, they will often validate on a second pass.
- Mail_server_did_not_respond - (unknown) These emails belong to a mail server that is not responding to mail commands. Most of the time, these emails will end up being invalid.
- Mail_server_temporary_error - (unknown) These emails belong to a mail server returning a temporary error. Most of the time, these emails will end up being invalid.
- Timeout_exceeded - (unknown) These emails belong to a mail server that responds slowly. Most of the time, these emails will end up being invalid.
Catch-All
This type of address is a mailbox on a domain that will “catch” all the emails sent to that domain, even if the address doesn’t exist. Businesses and government organizations usually configure catch-alls so they don’t miss any emails that may be sent to their domain. Keeping catch-all emails in the mailing list is risky, as it is unknown how many of them are going to bounce and hurt the sender’s reputation. Our vendor has a catch-all validation system that easily spots catch-all emails to further validate with AI Scoring and recommends to the user whether to send the email or not.
For more information on how to treat catch-all emails, refer to How to Use the Catch-All Status article.