How do I resolve issues with ISP's or outgoing mail servers?
When configuring your email settings, you may encounter issues with ISPs/Outgoing Mail Servers. Some ISPs block SMTP port 25, which can prevent your email software from connecting properly. If your ISP blocks port 25, you will need to use your ISP’s outgoing mail server to set up your outbound SMTP for your email account.
Here is a list of some Australian ISPs and their corresponding outgoing mail servers.
| AAPT | mail.aapt.net.au |
| Bigpond | mail.bigpond.com |
| Dodo | smtp.dodo.com.au |
| iiNet | mail.iinet.net.au |
| Internode | mail.internode.on.net |
| iPrimus | smtp.iprimus.com.au |
| OneTheNet | mail.onthenet.com.au |
| OptusNet | mail.optusnet.com.au |
| Ozemail | smtp.ozemail.com.au |
| Three (Mobile) | smtp.three.com.au |
| TPG | mail.tpg.com.au |
| Virgin | smtp.virginbroadband.com.au |
| Vodafone | smtp.vodafone.net.au |
If your ISP blocks SMTP port 25, choose the correct outgoing mail server from the list above to set up your outbound SMTP settings. This step is critical when dealing with ISPs/Outgoing Mail Servers issues to ensure your emails send reliably and securely. Network Dynamics recommends this method to avoid disruptions and maintain a smooth email flow. If you need any help or have questions about your SMTP configuration, please contact our Network Dynamics support team. We are here to help you keep your email running smoothly.