Check if a Domain Accepts Emails to Any Address
Identify catch-all (accept-all) domains that accept mail to any email address, even non-existent ones. Improve lead quality and targeting.
Enter an email to check if its domain is configured as catch-all (accepts any address)
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A catch-all (also called "accept-all") domain is a mail server configured to accept emails sent to ANY address on that domain, whether the specific mailbox exists or not. Instead of bouncing invalid addresses, the mail server accepts them and typically routes them to a catch-all mailbox or forwards them to an administrator.
For example, if example.com is set up as a catch-all, emails sent to non-existent addresses like [email protected], [email protected], or [email protected] will be accepted instead of bounced. This is different from normal mail servers which only accept emails for legitimate, configured mailboxes.
While catch-all domains serve legitimate purposes (catching emails to misspelled addresses, handling generic inquiries), they create challenges for email marketers and lead generators who cannot verify if a specific email address actually belongs to a real person or mailbox.
Catch-all domains create significant challenges for email marketing and lead quality.
Catch-all domains accept emails to ANY address, so you can't verify if a specific person actually uses that email address.
Emails may be delivered initially but bounced later if the catch-all eventually filters them out or forwards to non-existent addresses.
Emails to catch-all domains consume credits but may never reach a real person, wasting marketing spend.
Your subscriber counts appear larger because you're including unverified catch-all addresses.
Our detection uses SMTP testing to identify domains configured as catch-all.
We connect to the domain's mail server and initiate an SMTP connection.
We test the domain by attempting to send an email to a randomly generated address that definitely doesn't exist (e.g., [email protected]).
If the mail server accepts the non-existent address without rejecting it, we've identified a catch-all. Normal servers reject invalid addresses; catch-all servers accept them.
Handle catch-all domains strategically to improve your email program.
Create separate segments for catch-all and non-catch-all addresses to apply different marketing strategies.
Send to catch-all addresses at lower priority or with different sending frequency to manage reputation.
Track bounce rates for catch-all addresses separately to understand delivery performance.
Consider re-engagement campaigns for catch-all addresses before removing them from your list.
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