Catch-all email addresses explained why some can never be confirmed
Some domains accept mail for any address, real or not. That is why no check can confirm them, and why you should treat them as a guess.
- No credits, no data tax
- Your data stays yours
- Email only, on purpose
- Unlimited users
What a catch-all domain does
A catch-all email address belongs to a domain whose mail server accepts mail for any address at that domain. Write to anna@ or to xyz123@ and the server says yes to both. Some companies set it up so no mail gets lost; others do it to keep their staff list private.
For anyone who wants to know whether an address exists, that is a dead end. A checker asks the server whether the mailbox exists, and the server says yes to everything. The honest result is not valid or invalid but unknown, and the mail may still bounce later or land in a box nobody reads.
We call a guess a guess. Riftjaw does not verify addresses, and an address derived from a company domain is marked as derived. On a catch-all domain that guess cannot be confirmed by anyone, so it is worth knowing which records it applies to.
What you can do with catch-all addresses
Prefer a published address
An address the company put on its own website, contact page or legal notice is the best you can get on a catch-all domain. Note where you found it.
Keep guesses apart
Records with a derived address can sit in their own segment, so you send to the published ones first and to the guesses last, or not at all.
Use a general address when it fits
For a small business, the info@ or office address on the website often reaches the owner. It is published, so it is not a guess.
Watch the first batch
Send a small batch first and look at what comes back before you continue. A catch-all can accept mail now and bounce it later.
Handle catch-all domains in three steps
Mark how you got the address
Note on every record whether the address was published or derived. Derived addresses from a domain are marked for you; see email from a domain.
Send the published ones first
Make a segment of records with a published address and send that first, in batches of 10.
Decide about the rest
Look at the replies and bounces, then decide whether the derived addresses are worth a message or need a better source first.
Frequently asked questions
What is a catch-all email address?
An address at a domain whose mail server accepts mail for every address, whether the mailbox exists or not. Because the server says yes to everything, nobody can confirm from the outside that a specific address is real.
Can an email verification tool confirm a catch-all address?
Not with certainty. A checker asks the server whether the mailbox exists, and a catch-all server says yes to every address. Most tools report these addresses as unknown or accept-all rather than valid.
Will email to a catch-all domain bounce?
It can. The server may accept the mail at first and bounce it later, or deliver it to a box nobody reads. That is why a small first batch is useful. More on bounces in where cold email bounces come from.
Does Riftjaw detect catch-all domains?
No. Riftjaw does not verify addresses or test domains. It marks addresses derived from a domain as derived, so you can treat them as a guess and send to published addresses first.
Do I need credits?
No. There are no credits and no cost per record: a flat price per plan, and the size of your list does not change the price.
What is Riftjaw?
Riftjaw is a B2B lead database you own: import the companies you collect, keep every record with its source, sort them into segments and reach them by email in small batches. Each account runs on its own private server with its own database.
Know which addresses are a guess
Import your list, keep published and derived addresses apart and send the ones you trust first, in batches of 10. Start free, without a credit card.
Start free