Webmail bounces .biz domain with timeout
I've tried to send emails through vivaldi webmail to several addresses in domain crra.biz. For instance try firstname.lastname@example.org.
The message is bounced after about a week with a timeout. Sending to the same addresses with gmail is successful. Is the .biz domain the problem? Example follows:
This is the mail system at host mail.vivaldi.net.
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
I fear the ….biz domain server blocks mails from vivaldi.net.
Please ask the webmaster of the ....biz first about this problem.