Are you getting the problem in sending the mail to another domain server or client? If yes, then read the page and try to diagnose the problem on your own.
Checking the firewall
You need to check the firewall settings of your device. If you have enabled proxy settings or firewall on your computer, then you may get the problem in sending the mail from SBCglobal account.
Check the port number for SMTP settings on your SBCglobal account. If you are using 30, 35 or 27, then you might be wrong. Use 25 instead and see if you find the welcome screen on the computer or not. If you are getting ‘Not connecting to host’ message, then it means Proxy servers are not allowing the SMTP.
If the message is sent successfully from the server but not delivered to the receiver, then there might be some problem with the email address you have entered. You can check for possible issues from the SMTP debug or activity log. Follow the instructions given on the SBCglobal support link.
The information relating the domain and relay settings will be displayed on the screen. You can get a comprehensive report for the same from DNSReport link.
If your connection is being refused by the server, then you will find a problem in sending the mail. You can check the same from the activity log. If any problem related to the server is mentioned in the log report, then it means the IP address of the server is creating a problem or PTR record is not available.
Delivery delay notifications
If you are facing delivery delay notification, then you can contact SBCglobal support team or check the notification on screen, then contact the team. To diagnose the problem, you need to again check the activity or mail log tool. A detailed summary of the problem will be displayed on the screen.
You can check the sender address from the activity log if it is given under blocked email addresses list, then it means this is the only reason behind the problem. Inspect the SMTP outgoing queue properly for your SBCglobal account. Debug the entries from the logged account and combine the results to diagnose the problem.
Client relay settings
If your message is not being delivered due to client relay settings, then it is due to following reasons:
- SMTP relay settings.
- Incorrect user credentials.
- Account Authentication not enabled.
- Allow relay for authenticated senders.
When you click on ‘Allow relay for authenticated senders’ from SBCglobal mail account, you will able to send mail from the active username and password clients. You can easily send the mail to non-local addresses. The SMTP authentication is a must for outgoing mail. If it is not active, then an error message 503 will be displayed on the screen.
In case of email clients programs like Microsoft outlook or outlook express, you can enable SMTP from the option which says, ‘My server requires SMTP authentication’. Check the box given next to the option. In this way, you can get rid of outgoing mail delivery problem. If you want to bypass username and password of your mail, then you can use ‘Privilege IP’ method.
The username and email address must be in the following format: firstname.lastname@example.org.