How to solve the problem with SPAM mail filters

We make settings on the side of the domain provider

1. The SPF parameter. Allows you to specify which domains or ip addresses the message can come from.

Instructions from Yandex 

Instructions and examples in general 

2. DKIM. Добавляет к отправляемым письмам подпись.

Instructions from Yandex 

Falcon Space is a functional web development platform on a narrow stack MS SQL/Bootstrap. Falcon Space Gettting started

SQL-tool for creating personal accounts on the site

The essence of the approach and the history of the creation of Falcon Space
Web platform for creating personal accounts

Falcon Space Platform

This is a reduction in the cost of ownership

at the expense of fewer people to support

This is a quick change

while using the program

This is a modern interface

full adaptation for mobile devices

MS SQL web applications. Affiliate program for developers and web studios

You can develop yourself or collaborate with us for web development on the Falcon Space platform using only SQL and HTML.
View examples with SQL code
Platform documentation
Working on MS SQL Server