If you can not send email using mail.yourdomainname.com as your SMTP server, it may be because your ISP is blocking port 25 on their network, used for sending outgoing mail via the SMTP protocol. In this instance, we recommend using your ISPs outgoing mail server, which can be obtained from your ISP.
This practice has been put in place in an effort to stop spam. Telstra and Optus are some well known companies that have implemented the blocking of port 25 on their network. The email will still appear to have come from you, however it will be sent through a different network. This is normal and perfectly acceptable.
This practice has been put in place in an effort to stop spam. Telstra and Optus are some well known companies that have implemented the blocking of port 25 on their network. The email will still appear to have come from you, however it will be sent through a different network. This is normal and perfectly acceptable.