To correct this problem, you should contact the system administrator of your mail server (usually "postmaster@your-domain.com") and forward them a copy of the bounced email you received. Otherwise, you should call technical sup...

If you are seeing this same error consistently over an extended period of time and you feel that your policies and practices comply with our guidelines (described below), we would encourage you to contact us with detailed information so that we can help diagnose yourMail | Mail Classic | Mobile Mail

If you’re seeing the same error consistently over an extended period of time, we encourage you to provide us with detailed information , including the error and diagnostic code(s) you see in your logs, so that we can help diagnose your p...

Most emails are delivered within a few minutes, but emails can sometimes be delayed while in transit due toMail | Mail Classic

Please be aware that Yahoo! Mail supports up to 5 external mail addresses. If you are within the supported external mail address limit, and continue to experienceMail | Mail Classic

If you are having difficulty receiving mail forwarded from your Yahoo! MailMail | Mail Classic

Some Yahoo! Mail customers experienced mail delivery issues when sending to their disposable email addresses containing capitalization.Mail | Mail Classic | Mobile Mail

The rejected email couldn't be authenticated against the sending domain's policy (e.g., due to a missing or bad signature). We recommend that you contact your domain's mailMail | Mail Classic | Mobile Mail

If you've double-checked the items above but continue to have problems receiving messages, your difficultyMail | Mail Classic | Mobile Mail