I have a welcome newsletter that is supposed to give a gift to the subscriber. I have gotten 8 messages like the following within the last few days. What is going on?
This is the mail system at host gateway21.websitewelcome.com.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<-----------@yahoo.com>: delivery temporarily suspended: lost connection with
mta7.am0.yahoodns.net[126.96.36.199] while sending RCPT TO
Final-Recipient: rfc822; -------------@yahoo.com
Diagnostic-Code: X-Postfix; delivery temporarily suspended: lost connection
with mta7.am0.yahoodns.net[188.8.131.52] while sending RCPT TO