Verify emails (syntax, MX, SMTP mailbox, catch-all), test email DNS and check Spamhaus blocklists.
Free
One server, in email. Verify emails (syntax, MX, SMTP mailbox, catch-all), test email DNS and check Spamhaus blocklists.
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1 MCP server. 1 of 1 is free to start.
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0 of 1 use OAuth
The rest either hold an API key issued by the publisher or ask for nothing.
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