true if server advertises STARTTLS. You cannot get valid value before opening SMTP
session.
true if this object uses STARTTLS.
true if this object uses STARTTLS when server advertises STARTTLS.
Enables SMTP/TLS (STARTTLS) for this object. context
is a OpenSSL::SSL::SSLContext
object.
Disables SMTP/TLS (STARTTLS) for this object. Must be called before the connection is established to have any effect.
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see Enumerator
#with_index.
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