Google suspected some words may spam-phishing

[ses]

We found problem when we have got emails have keywords like sineeducation.com those emails will go to spam folder and says it's dangerous. This is effected between Google to Google (gmail to gmail etc.) but no problems for Google to others. (gmail to hotmail etc.) I attached examples below.

[icrew]

One of the first things that’s good to check when it comes to stuff being flagged as spam is to make sure that SPF (and ideally also DKIM and DMARC) are properly set up for your domain. See https://support.google.com/a/answer/10583557 for all the details.

Hope that helps, at least a little,

Ian

[Aryan1]

as of my knowledge this thing occours during the bulk emailing 

when gmail bulk emailing reaches to its maximum limit but i think this a good feature.

i think this will help you

 https://support.google.com/mail/answer/81126?hl=en

[ses]

We already set SPF, DKIM an DMARC. We did everything but still have problems.

Other advise will be great. Thank you.

[Aryan1]

One of the reasons your emails may be marked as spam is the incorrect configuration of DMARC, DKIM, and SPF records.

[cryptochrome]

Unfortunately, your screenshots are really hard to read. Actually, I can't read the content at all. So it's hard to say what is going on.

Regardless, if you think that Google incorrectly flags your sineeducation domain as phishing/spam, you can request a re-evaluation of the site by Google's Safe Browsing team here:

https://safebrowsing.google.com/safebrowsing/report_general/