In general this requires the recipient server to trust the sending server, meaning this aspect of SMTP-AUTH is rarely used in the Internet.
This aspect of SMTP-AUTH is rarely used in the Internet. In general this requires the recipient server to trust the sending server.
In general this requires the recipient server to trust the sending server. This aspect of SMTP-AUTH is rarely used in the Internet.
In general this requires the recipient server to trust the sending server. This aspect of SMTP-AUTH is rarely used in the Internet.