What is an SMTP certificate error and why does it occur?

By: USER4362
28 Agustus 2025 Support 5 minutes
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Grade: Education Subject: Support
What is an SMTP certificate error and why does it occur?
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An SMTP certificate error occurs when your email server (or client) fails to verify the digital certificate presented by the receiving mail server. This typically happens because the certificate is invalid, expired, not trusted by your server, or the server is requesting a certificate that doesn't match the domain it's using.
Answered on 28 Agustus 2025

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