[Formit] How can avoid anti-spam firewall

pierrot10 · March 28, 2026, 1:19pm

Summary

I installed Formit for a website. While a visitor send a subscription course, Formit send successfully an e-mail to the my client, but the server if company stop the e-mail because it concider it as a spam.

I asked my client to contact her sys admin to white list the sender e-mail, and the sysadmin asked me to configure my system to sign the sent e-mail with DMARC or DKIM.

Somehone know how I can di that with Formit and MODx?

Thanks

Environment

MODx 3.05
Formit 5.1.1

halftrainedharry · March 28, 2026, 2:40pm

Since MODX version 3.1 there exist various system settings mail_dkim_{xy} (e.g. mail_dkim_domain, mail_dkim_identity, etc.) that you could potentially use to set up DKIM.

github.com/modxcms/revolution

Enable DKIM capabilities by default via settings

opened 04:17AM - 23 Feb 23 UTC

closed 02:47PM - 29 May 24 UTC

krisznet

feature

## Feature request ### Summary Native DKIM capabilities in modMailer would be …very useful. The functionality is already there but can't be used by default or with an extension like FormIt. ### Why is it needed? More and more companies moving to DKIM and also using 2-factor authentication for email accounts, so even secure SMTP is not an option for those. SPF record is often not enough to be able to deliver email reliably. ### Suggested solution(s) MODx uses PHPMailer which is capable of sending emails using DKIM, even modMail and modPHPMailer implementation are capable of using them. It can be used from a snippet but it can't be used with in-built functionality or with an extra like FormIt. So a simple solution would be adding those DKIM options to the settings and also modifying modMailer::getDefaultAttributes() function so it would utilise those settings.