Suspicious activity detected while sending email
The "suspicious activity detected" and "account temporarily blocked from sending messages" errors put a hold on your account, preventing you from sending email for a few hours. You'll have to wait for the hold to clear on its own. Avoid this error in the future by limiting these sending habits:
- Sending a lot of emails in a short time.
- Sending duplicate info in your email repeatedly.
- Sending 1 or more emails to a large number of recipients.
- Having a message stuck in the Outbox of the Yahoo Mail app.
Doesn't sound like your sending habits? Someone else may be sending email from your account. Find out how to secure a hacked account.