My mails are ending up in the receiver's spam


Sending an email from a sender address (sender@yyy.yyy) to a specific reveiver address ( I get the following reply:

[quote] host[] said: 550 we do
not accept mail from this address. (in reply to RCPT TO command)
Reporting-MTA: dns;
X-Postfix-Queue-ID: 2B6C75F2068
X-Postfix-Sender: rfc822; sender@yyy.yyy
Arrival-Date: Sat, 30 Apr 2016 11:29:49 -0700 (PDT)

Final-Recipient: rfc822;
Original-Recipient: rfc822;
Action: failed
Status: 5.0.0
Remote-MTA: dns;
Diagnostic-Code: smtp; 550 we do not accept mail from this address.[/quote]

Is there anything I can do to prevent my mail to end up in the receiver’s spam?


Not on your end. That’s the idea behind a spam filter. They need to unblock you on their end.

It’s entirely possible your mail server is blacklisted.

I have a account. I use it to send out newsletters. A low-volume account is free. I believe you can set up a mail client to use it as an SMTP server for your outbound mail.