I am looking for the webmail administrator.
Every time I send a mail to a friend I got the an undelivered message:
rejected: Your MTA is listed in too many DNSBLs; check
Could anyone help me?
You have a problem with Vivaldis Webmail client? Or which client do you use with your vivaldi.net address?
Which mail provider rejects your mail?
That blacklist you link does not seem to indicate any issues with our services. What is your friends email domain. That is not his email just what comes after the @ sign.