Just moved today to Telstra Wireless Internet, previously on Optus Wireless internet. Outlook client worked fine, now on Telstra can receive emails but not send. Tried
None will let me send emails. Don't know what port Telstra is blocking??
Gmail account using Outlook client for Windows.
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Telstra and most ISPs blocks port 25 to other than there own mail servers. The other ports should work Okay.
There could be a problem with outlook and Gmail. Gmail used to work via outlook on my PC but no longer works. It still works using windows mail on the same PC.
Gmail considers many versions of Outlook as not secure. You can override this in Gmail by opening on webmail and going into secitity settings. It still every now and then reminds that its not secure.
I have already overridden security settings to use less secure apps and still doesn't work. Google considers everything except its own apps as less secure.