`Host` denotes the SMTP server hostname used for sending emails.
Port::
`Port` denotes the SMTP server port.
From::
`From` denotes the address used for the `From` SMTP-Header for the emails sent.
From Display Name::
`From Display Name` allows to configure an user friendly email address aliases (optional). If not set the plain `From` email address will be displayed in email clients.
Reply To::
`Reply To` denotes the address used for the `Reply-To` SMTP-Header for the mails sent (optional). If not set the plain `From` email address will be used.
Reply To Display Name::
`Reply To Display Name` allows to configure an user friendly email address aliases (optional). If not set the plain `Reply To` email address will be displayed.
Envelope From::
`Envelope From` denotes the https://en.wikipedia.org/wiki/Bounce_address[Bounce Address] used for the `Return-Path` SMTP-Header for the mails sent (optional).