Email List Cleaning
Preparing contact data by identifying duplicates, malformed values, and records that need review before a campaign.
Email Verification
Checking available address and mail-server evidence to classify an email address. Verification does not establish consent or guarantee inbox placement.
Valid
The check found evidence consistent with acceptance at the time of verification. Sender reputation, content, and later mailbox changes can still affect delivery.
Invalid
The available evidence indicates an address should not be used as supplied. Review the detailed reason, such as syntax or a nonexistent mailbox.
Unknown
The check could not reach a conclusive mailbox result. Keep it separate from invalid addresses and review the reported reason.
Catch-All
A domain accepts checks for many or all recipient names. Domain acceptance alone does not establish that an individual mailbox exists.
Role Address
An address associated with a function or team, such as sales or support. It may be deliverable but requires a campaign-specific decision.
Disposable Address
An address associated with a temporary-email service when supported by the available classification data. A missing flag is not proof of permanence.
Suppression
Excluding addresses that should not be contacted, such as unsubscribed recipients or previously bounced addresses. Verification does not override suppression.
MX Record
A DNS record identifying mail servers for a domain. It describes mail routing, not the existence of an individual inbox.
SPF
A DNS policy describing which servers are authorized to send mail for a domain.
DKIM
A cryptographic message signature that lets receiving systems check a signing domain and whether signed content changed.
DMARC
A policy connecting the visible From domain to SPF or DKIM alignment and describing handling and reporting preferences.
Blocklist
A list operator’s record of IP addresses or domains associated with its listing criteria. An unavailable lookup is not a clear result.
Deliverability
Whether messages reach their intended recipients, influenced by reputation, authentication, permission, content, and recipient policies as well as address quality.
Read The Detailed Result Status Guide or Explore The Verification Methodology.