I have 10 email accounts including gmail, Google Workspace, Zoho Mail, Microsoft 365, Outlook.com and I can no longer send email from any of them.I get the following message
[SMTP] An attempt to connect to (insert email address here) failed. This could be caused by temporary server unavailability or incorrect settings.
This error is recent (ther past 3 days) and if I use a different email client sending works fine.