Your ISP may be blocking port 25 which would require you to use their outgoing mail server to send on. To test please do the following:
1) Open a command/DOS prompt while connected to the internet.
2) Type in the following command and press ENTER:
telnet mail.the-domain-name.com 25 **REPLACE: the-domain-name.com with your actual domain**
If the above command errors out then your ISP is blocking port 25 and you must use their server to send.
If you have any further issues, questions, or would like some assistance checking on this or anything else, please reach out to us from your my.hivelocity.net account and provide your server credentials within the encrypted field for the best possible security and support.
If you are unable to reach your my.hivelocity.net account or if you are on the go, please reach out from your valid my.hivelocity.net account email to us here at: support@hivelocity.net. We are also available to you through our phone and live chat system 24/7/365.