How to configure the correct sending of emails from an external server?

Question

Domain Name System

Hello. Tell me how to implement a scheme by analogy with sendpulse.
I have one site on a cheap hosting and there is a vps on which there is an smtp server.
I want to send mail via SMTP through VPS. And I want to realize that the sender and signed were the same as on the hosting.
They suggest to change spf1 entry (add include:mxsmtp.sendpulse.com) and to add x._domainkey signature
I have access to dns on hosting (for site domain) and accordingly full control over vps.
In general, I want to drive mail through my external smtp server, but in the letter (sent via, from and signed) the domain appeared on the hosting

Answer 1

If you have access to a DNS server, then you need to set up DKIM and SPF records.

Answer 2

Set up DNS and mail server.
And it is desirable not to write any rubbish in the subject and body of the letter.

Answer 3

just connected yesterday;) msmtpd

host smtp-pulse.com
account mxxxxxx.ru
logfile /home/bitrix/mxxxxxx.ru.log
port 587
from [email protected]

так же постфикс тоже умеет это делать
keepbcc on
auth login
user [email protected]
password LSsSdCLfasdf

tls off
tls_certcheck off

Here in this VM, by default, mail goes through it, and there is a console admin panel, plus there is site speed optimization.
https://www.1c-bitrix.ru/products/vmbitrix/
sh script below