Knowledgebase: E-mail
Does Thunderbird support secure SMTP?
Posted by Support on 20 October 2011 09:36 AM

Yes, Thunderbird also lets you customize the security settings for outgoing SMTP and authentication: by default, outgoing authentication happens in plain text (not secure), which we support. However, authentication can be done in secure mode as well.

The standard SMTP ports are as follows:

  • No security: Port 587
  • TLS: Port 587 (unlike SSL, TLS doesn't require that another port be opened)
  • SSL: Port 465

Thunderbird offers the following options: No [security] (default), TLS if available (else plain text), TLS (mandated), or SSL (mandated). Email accounts created in Thunderbird are automatically set to use the most common configuration: plain text and port 587.

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