and what error message to you see? We know exactly what you tell us. So we can only guess what your issue is when you don't explain what information you have as to why you can not do things.

Hi Matt, This is the error I get

"This is the mail system at host mail106.syd.optusnet.com.au.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

                  The mail system

<pxxxxxxxxxxxxx39@hotmail.com>: host

   hotmail-com.olc.protection.outlook.com[104.47.57.33] said: 550 5.7.1
   Unfortunately, messages from [211.29.132.42] weren't sent. Please contact
   your Internet service provider since part of their network is on our block
   list (S3150). You can also refer your provider to
   http://mail.live.com/mail/troubleshooting.aspx#errors.
   [SN1NAM02FT0063.eop-nam02.prod.protection.outlook.com] (in reply to MAIL
   FROM command)

Reporting-MTA: dns; mail106.syd.optusnet.com.au X-Postfix-Queue-ID: 4179476B979 X-Postfix-Sender: rfc822; pxxxxxxxxxxxx@tpg.com.au Arrival-Date: Sat, 22 Oct 2022 15:15:12 +1100 (AEDT)

Final-Recipient: rfc822; pxxxxxxxx39@hotmail.com Original-Recipient: rfc822;pxxxxxxxxxx39@hotmail.com Action: failed Status: 5.7.1 Remote-MTA: dns; hotmail-com.olc.protection.outlook.com Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [211.29.132.42]

   weren't sent. Please contact your Internet service provider since part of
   their network is on our block list (S3150). You can also refer your
   provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
   [SN1NAM02FT0063.eop-nam02.prod.protection.outlook.com]"

All was working okay until I did an update just over a week ago? Cheers

Also getting similar error with gmail and others.

That message is from hotmail/Outlook.com (Microsoft) to you about the fact they have at least part of the Optus network on a mail blocklist. Probably as a spammer.

I checked a couple of blocklists. It looks like the address is listed as a spammer with http://www.sorbs.net/cgi-bin/db

There are three entries here https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a211.29.132.42&run=toolpage

So fundamentally you are in between Microsoft asserting that Optus (that IP address) is a spammer and Optus doing nothing about it at this point in time, perhaps because they are unaware. But Optus are the only ones that can really do anything about their network being listed. I suggest you contact them and request they actually do something about it.

Thanks Matt, I think you are correct. Seems google also has it listed as well (same problem). I do seem to be able to get email through to non-microsoft/google accounts. Many thanks for your help. Cheers, Peter