Delivery Problem to Charter.net Emails

Unfortunately, Charter.net (Spectrum) email users can't receive any email message from Vovsoft.

If you're using your @charter.net or @chartertn.net email address, it's likely that you won't be able to

• subscribe to our newsletter
• receive your license key information
• get response from us about your support requests

Due to technical issues with their mail server, our emails aren't reaching Charter.net addresses. We constantly receive the error below, when we try to send email to Spectrum mail server:

Our IP is not (and never) listed in any public blacklist databases, and it has gained good reputation over the years. We have proper reverse DNS record (PTR). We also have proper SPF and DKIM records. Major email providers accepts our emails. However, Charter.net doesn't seem to care about them.