The reason for the problem:
5.3.0 - Other mail system problem 550-'5.7.26 This mail is unauthenticated, which poses a security risk to the\n5.7.26 sender and Gmail users, and has been blocked. The sender must\n5.7.26 authenticate with at least one of SPF or DKIM. For this message,\n5.7.26 DKIM checks did not pass and SPF check for [pamsplace.com.au] did\n5.7.26 not pass with ip: [220.127.116.11]. The sender should visit\n5.7.26 https://support.google.com/mail/answer/81126#authentication for\n5.7.26 instructions on setting up authentication. c29-20020a056a00009d00b0064d457bd84fsi3850447pfj.230 - gsmtp'
I am using my TPG e-mail that I have used for over 20 years. I pay about $99/year for pamsplace.com.au domain name to be hosted by TPG.
The e-mail address I use all the time is xxxxxx linked to my tpg.com.au account.
The problem with gmail.com recipients has only occurred recently. i have made some setting changes to my e-mail in Outlook and SOME **@gmail.com go through others are blocked.
My wife xxxxx also uses the TPG account her name email@example.com and xxxxxx has the same problem. She uses an Apple computer with Outlook.
I need to know how to fix the problem that Google have added to their gmail authentication.