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Copy file name to clipboardExpand all lines: docs/content/administration/email-setup.en-us.md
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@@ -61,7 +61,7 @@ Please note: authentication is only supported when the SMTP server communication
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- STARTTLS (also known as Opportunistic TLS) via port 587. Initial connection is done over cleartext, but then be upgraded over TLS if the server supports it.
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- SMTPS connection (SMTP over TLS) via the default port 465. Connection to the server use TLS from the beginning.
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- Forced SMTPS connection with `IS_TLS_ENABLED=true`. (These are both known as Implicit TLS.)
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- Forced SMTPS connection with `PROTOCOL=smtps`. (These are both known as Implicit TLS.)
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This is due to protections imposed by the Go internal libraries against STRIPTLS attacks.
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Note that Implicit TLS is recommended by [RFC8314](https://tools.ietf.org/html/rfc8314#section-3) since 2018.
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