Catch-all Scoring
Most verifiers see a catch-all domain and give up. VeriMails assigns a probability score to each address — so you know which ones are worth sending to.
What Is a Catch-all Domain?
A catch-all (or accept-all) mail server accepts email for any address at its domain — even addresses that don't exist. This is common in corporate environments where IT teams want to ensure no email is ever bounced.
The problem: when you try to SMTP-verify john.smith@company.com, the server says "yes" regardless of whether that person works there. Traditional verifiers mark these as unknown and leave you to guess.
In B2B email, 20–40% of corporate domains are catch-all. Discarding all of them means leaving a huge portion of your list on the table.
How VeriMails Scores Catch-all Addresses
Pattern Analysis
We analyze the email format against known patterns for the domain — first.last@, flast@, firstname@ — and cross-reference against observed valid patterns.
Historical Signal Data
VeriMails maintains a database of verified address patterns across millions of domains. We look for signals that indicate an address is likely to be a real mailbox vs. a guessed format.
Domain Reputation Signals
We factor in MX configuration, SPF setup, domain age, and email infrastructure signals that correlate with deliverability on catch-all domains.
How to Use Catch-all Scores
| Score Range | Interpretation | Recommended Action |
|---|---|---|
| 80–100 | High confidence — very likely valid | Include in campaigns |
| 50–79 | Medium confidence — probably valid | Include in lower-priority sends |
| 30–49 | Low confidence — uncertain | Manual review or skip |
| 0–29 | Very low — likely invalid | Exclude from all sends |
Scores are continuously updated as we observe real-world deliverability data.