Enum lettre::transport::smtp::client::TlsVersion

#[non_exhaustive]
pub enum TlsVersion {
    Tlsv10,
    Tlsv11,
    Tlsv12,
    Tlsv13,
}

Available on crate feature smtp-transport only.

TLS protocol versions.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Tlsv10

TLS 1.0

Should only be used when trying to support legacy SMTP servers that haven’t updated to at least TLS 1.2 yet.

Supported by native-tls and boring-tls.

Tlsv11

TLS 1.1

Should only be used when trying to support legacy SMTP servers that haven’t updated to at least TLS 1.2 yet.

Supported by native-tls and boring-tls.

Tlsv12

TLS 1.2

A good option for most SMTP servers.

Supported by all TLS backends.

Tlsv13

TLS 1.3

The most secure option, although not supported by all SMTP servers.

Although it is technically supported by all TLS backends, trying to set it for native-tls will give a runtime error.

Trait Implementations

impl Clone for TlsVersion

fn clone(&self) -> TlsVersion

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TlsVersion

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for TlsVersion