MailboxValidator
MailboxValidator checks email addresses for syntax, deliverability, mail-server availability, and free or disposable provider status.
What agents can do
Actions3
Check disposable email
Check whether one email address uses a disposable email provider.
Check free email
Check whether one email address uses a free email provider.
Validate email
Run comprehensive syntax, domain, mail-server, reputation, and provider checks on one email address.
How it connects
You paste an API key from MailboxValidator on a page Composio hosts, so the key never passes through Definable.
Keep the connection to yourself or share it with your workspace. Any action that writes or sends can wait for your approval.
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