I have an ATT Yahoo email account. Recently my Mac computer stopped letting me send out emails. I have checked and recheck the accounts. It seems my settings are correct (I hope that is true). I can receive emails but cannot send out.
iMac 21.5", macOS 10.13
As I was going through your instructions, all seemed to be well. Yet, I still cannot send out email. I have the MAC desktop computer and I go through ATT with my Yahoo account. It gives me an error message that says "cannot send message using the server Sbcglobal". "Server response was: Error sending message for delivery."
I have checked and rechecked everything.
No I cannot.
Still will not let me send out emails! I'm thinking it has something to do with the fact that it is ATT via Yahoo.
Any luck with https://websitesmail.att.com/
What happens exactly when you try?
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
Sys Prefs>Network>highlight the Interface you're using>Advanced>TCP/IP>Configure IPv4: Using DHCP.
If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.
System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
8.8.8.8
8.8.4.4
1.1.1.1
9.9.9.9
Apply.
Sending Emails
