Big names labeling my email as spam

[wallmapu]

It will depend heavily on your setup first. Check the forum email section we had been giving all the tips over and over.

1. check SPF, reverse DNS records.

2. check you are not black listed.

3. think about DKIM

You will need also time to gain trust and ensure your servers are clean from spam.

Those are few steps.

M B

1, 2 and 3 are passed.  I don't know what else to do. I'm using free nameserves. Can this be a red flag to the recpients?