text: Title: spam false positive
  Body: Hello!
  SimpleLogin rejects emails from fwd@dropmail.me. This address is NOT malicious and is used by dropmail.me (a one-time mailbox generation service with forwarding to a real email address). Please fix this problem.
  
  However, emails are sent perfectly to all addresses (including one-time emails (tested on 10minutemail.net and temp-mail.org)), which tells us that this is a problem on the SimpleLogin side.
  
  Links:
  Issue website: https://dropmail.me
  Issue email receiving from: fwd@dropmail.me
  
  Important notes:
  The problem with forwarding from fwd@dropmail.me is ONLY to SimpleLogin addresses. Forwarding to ProtonMail/Gmail/Yahoo and so on works OK
  
  SimpleLogin rejects the mail from fwd@dropmail.me with “554 5.7.1 Spam message rejected”. 
  
  Yes I know about surbl (https://www.surbl.org/) blocking. I had contacted them, but their tech support response was that "this is a problem on the recipient side and that temp mail services providing forwarding functions often get on such lists. You need to contact the support team of your email provider" n
  
  Please fix the issue