OptionalfromDefault sender address. Overrides MAIL_FROM.
OptionalhostSMTP server hostname. Overrides MAIL_HOST.
OptionalpassSMTP password. Overrides MAIL_PASS.
OptionalportSMTP server port. Port 465 uses SSL. Overrides MAIL_PORT.
OptionalrequireRequire encrypted SMTP transport. Non-465 ports must negotiate STARTTLS;
port 465 always uses implicit TLS. Overrides MAIL_REQUIRE_TLS.
Disable this only for a trusted local SMTP capture service.
OptionaluserSMTP username. Overrides MAIL_USER.
Options for the SMTP mail provider factory.