How to use local smtp in vtiger?

Question

linux

I configured google smtp on vtigercrm 5.4
And it became necessary to use exim as smtp,
I configured exim for this purpose,
but I don’t know what to change in crm vtiger, I tried to change it in the /module/Email/class.phpmailer
folder

public function IsSMTP() {
    // $this->Mailer = 'smtp';  // было
    $this->Mailer = 'sendmail';  // стало
  }

but this is how letters end up in spam and there is no certainty that exim was used

Answer 1

You can look at the logs of Exim itself
/var/log/exim/main.log and search there at your address (where you sent it)
For example cat /var/log/exim/main.log | grep '[email protected]'
You can open the source of the letter and see in the headers who sent it to you (server ip address)
In order not to get into spam, you need to follow certain rules
For example:
There must be a writeback for ip
It is desirable that it be configured spf and dkim, and even better dmarc (Thanks to it, you can get reports from gmail, for example, about who sent letters on behalf of your domain to their servers and why they were quarantined)
Check your ip in various DNSBL lists (Perhaps someone before you used it And he doesn't have a very good reputation.
Read the recommendations mail.ru/gmail.com/... on how not to get spammed by them, everything is well written there
https://help.mail.ru/developers/mailing_rules/technical