Fix: Yahoo SMTP Error Code Tss04

Yahoo SMTP Error Code Tss04
  • Step 1: The Yahoo SMTP error code Tss04 is also referred to as the error 421 4.7.0.
  • Step 2:The error occurs when there is an unusual amount of traffic from your IP address.
  • Step 3:It can also occur if the email recipients from your mail server are generating complaints from Yahoo mail users.
  • Step 4:The error is read as 

421 4.7.0 [TSS04] Messages from x.x.x.x temporarily deferred due to use complaints - 4.16.55.1

  • Step 1:Sign up for Yahoo’s complaint feedback.
  • Step 2:Once you sign up, you will receive an email showing you if your Email is marked as a Spam.
  • Step 3:If you receive this feedback, it is advised to remove the user from your mail contact to avoid further occurrences.
  • Step 4:The Yahoo SMTP error code Tss04 is, however, Temporary. 
  • Step 5:It is advised to wait for a couple of hours as the error can be fixed without any meddling.
  • Step 6:It is necessary to send a few mails to recheck after encountering the error.

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