I can't send emails
I am using yahoo.com for more that 12 years. But since November 2015 I am unable to send emails. I tried different devices and from different IPs but same problem persists. After sending emails it fails and giving messages "this message is marked as spam by our system you can delete this message or edit it before sending it out". I tried different the following:
1. Tried with different subjects.
2. Tried different email contents.
3. No link is there in the email content or in the subject.
4. I changed password many times but same error persists.
5. Tried different receivers.
Nothing left to try, how someone can help me.