DiskPastSupport
Product help: support@diskpast.com. Replies come from that same address. Sign-in and password emails come from mail@diskpast.com, not support. Legal: legal@diskpast.com. Security: security@diskpast.com.
For card, tax, or Polar receipt issues, Polar is the merchant of record — include the Polar receipt. For keys and seats, include the email you paid with (not the key in public tickets).