Understand the terminology on our dashboard


A deliverable result means the recipient's email is valid. Bounceless determined this address is safe to send to within our 95% Deliverability Guarantee.


An invalid email means the email address does not exist, for one of the reasons you get in the validation report(please check next section: Detailed result guide)

Accept All

Emails that always returns a valid status, but from some domains that accept all emails, you attempt to send to them. Typically, these domains are trying to protect their legitimate users by telling the sending mail server it will accept the mail for a given email address, but then silently discard the message or send a bounce message after the fact.


Disposable addresses are created to be Valid only temporarily so their owners can sign up for promotions or services without using a primary address. Disposable addresses will not perform and typically just take up space in your database.


Bounceless will return an unknown result when it was unable to get a response from the recipient's mail server. This often happens if the destination mail server is too slow or temporarily unavailable. In some cases, retrying your request after about 5 minutes will return a valid or invalid response. Unknown addresses don't count against your verification balance.


Spamtraps addresses are created not for communication, but rather to lure spam. In order to prevent legitimate email from being invited, the e-mail address will typically only be published in a location hidden from view such that an automated e-mail address harvester (used by spammers).

Understand the result codes within your report

all is ok : of catch all emails is when the server is saying that it is ready to receive a letter to this address, and no trickshave been detected

error - server: is saying that delivery failed, but no information about the email exists
smtp_error: SMTP answer from the server is invalid, destination server reported an internal error to us.

smtp_protocol: destination server allows us to connect, but SMTP session was closed before the email was verified.

unknown_email: server saying that delivery failed, and the email does not exist.

t_attempt_rejected: delivery failed, reason similar to “rejected".

relay_error: delivery fail because a relaying problem took place.

antispam_system: some anti-spam technology is blocking the verification progress.

email_disabled: email account is suspended/disabled/limited and can't receive emails.

domain_error: email server for the whole domain is not installed or is incorrect, so noemails are deliverable.

ok_for_all: email server is saying that it is ready to accept letters to any email.

dead_server: email server is dead, no connection to it exists.

syntax_error: syntax error in email address.

unknown: email delivery failed, but no information about why.

invalid_mx : Could not get MX records for domain

Did this answer your question?