First of all WebMail is for internal use. No webmail for external mailing. In case of external mailing, we see many types of problems where your mail delivery fails or is not received at the time of receipt. In a word, web mail is for general use and for internal use.
For professional use, business mail or mail exchanger must be used, such as free Zoho, Yandex and many paid ones such as GSuite, Microsoft Office 365, Zoho Pro, etc.
You can see our business mail packages
Now why does web mail go to spam?
There may be some reasons for this such as:
1/ Your domain is so new that mail companies don't trust it, so they put it in spam, this may be the case with paid mail services for some time.
2/ You are using web hosting, not mail hosting, mail companies recognize this server as a web hosting server.
3/ No unsubscribe header.
4/ There is any file or text that is classified as spam according to the mail company's algorithm.
Remedy:
At the beginning of the article it is said that web mail is not for professional use. Therefore, it will be solved only if you use business mail or mail exchanger for professional use all over the world. For example, there are free Zoho, Yandex and many paid ones like GSuite, Microsoft Office 365, Zoho Pro etc. And if you do not spam the webmail, then it is often resolved after a few days.
