I am an IT professional and am aware of the reasons a SMTP server may blacklist an account for SPAM. However, this issue has been reported previously by many users, and with no changes to any of our three computers in regards to virus/trojan/spam activity we have started having this issue all within 2 weeks of each other. In the previous community posts regarding this, your TPG rep has 'reset' the connection to the SMTP server to fix the issue (see link below). I suspect this actually means removing the account from the blacklist or similar.   https://community.tpg.com.au/t5/Broadband-Internet/Outgoing-e-mails-labelled-as-spam-and-not-sent/td-p/44467   I do not believe this issue is due to virus like mail activity in these instances, and another close family member rang TPG support 2 weeks ago to solve this issue, and it did not help by resetting the password on the account. The only way to temporarilly fix the issue was to create a new mail profile in Outlook, which in itself is quite odd as that would point to outlook as the issue, but the new profile is identical to the old..   Can you try the fix as per previous posts for us first? ... View more

Pretty sure they only offer static IP addresses on their business plans. I have been waiting for static IP's on residential plans for 5 years since they took them away as part of the adsl->NBN migration, but I doubt it will happen. Back then I started using a free Dynamic DNS service so that I could always connect to my home network using a domain name (ie homepc.ddns.net etc) and I continue to use it. ... View more