The SMTP provider implements an SMTP Evolution/Camel.Transport.
This will send email using SMTP (or SMTPS), supports SSL, TLS and the usual Evolution/Camel.SASL authentication modes.
It supports the ENHANCEDSTATUSCODES extension.
It supports the 8BITMIME extension.
Messages will automatically be down-encoded into a format which matches the transport mode. i.e. binary encodings will never be sent, and 7bit encodings will be used unless 8BITMIME is present.
Bcc headers are automatically stripped when sending.