Goes into spam folder on gmail and outlook

1

My system check is below.

:heavy_multiplication_x: Your box’s reverse DNS is currently box.postaman.com (IPv4) and
[Not Set] (IPv6), but it should be box.postaman.com. Your ISP or
cloud provider will have instructions on setting up reverse DNS for
your box.
:heavy_multiplication_x: The TLS (SSL) certificate for this domain is currently self-signed.
You will get a security warning when you check or send email and
when visiting this domain in a web browser (for webmail or static
? No TLS (SSL) certificate is installed for this domain. Visitors to
a website on this domain will get a security warning. If you are
not serving a website on this domain, you do not need to take any
action. Use the TLS Certificates page in the control panel to
install a TLS certificate.

? No TLS (SSL) certificate is installed for this domain. Visitors to
a website on this domain will get a security warning. If you are
not serving a website on this domain, you do not need to take any
action. Use the TLS Certificates page in the control panel to
install a TLS certificate.

when I send mail from my fresh installition , my mails go into spam folder of gmail and outlook.

What is the reason and how to fix it?

2

Fix everything that’s a red X. No reverse DNS is bad, a self-signed TLS certificate is really bad.

4

The point is that I do not get reverse dns error with mxtoolbox.com email server test. Who is right mail in a box or mxtoolbox.com.

Also will the problem exactly be solved with no red X? I do ask because I dunno want to pay for SSL sertificate.

5

It could be anything. There’s no way to know why your mail gets marked as spam.

Your reverse DNS looks good to me.

6

Are you using an old version of MIAB? You should be able to autoconfigure TLS using Let’s Encrypt for free.

7

I have confgured ssl from wosign it seems working for now. No spam folder.

Also got to edit first message because of spammers.