Recipients at @yahoo.com and @aol.com (only ones I've tried so far) are not receiving my emails. There are multiple people/platforms involved, so I know its not just one person/service. Others on Reddit are experiencing the same issue. I have sent from different internet services, sent from my phone app on cell service and phone app on wifi. None of them work.
12+ hours after my attempt, I receive an undeliverable email from postmaster @ outlook that states:
Delivery has failed to these recipients or groups:
xxxx @ yahoo.com Your message wasn't delivered. Despite repeated attempts to deliver your message, a connection to the remote server was closed abruptly.
Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that your email system is unable to connecto their email system. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.
For Email Admins This often indicates the recipient's firewall SMTP fixup setting or other firewall settings are preventing the SMTP protocol negotiation from succeeding.
@goody222 No solution unfortunately but am experiencing the exact same issue. Started about a week ago. Every message I send to multiple yahoo.com addresses bounce back. Sending from my Outlook.com account. Same bounce-back message you're seeing too.