Question about emails

I currently have Invoice Ninja self-hosted on one server and use another server for emails. In Invoice Ninja I have the details of the email account set-up as SMTP. I noticed that my clients often do not receive my invoices but do receive my regular emails.

I sent a test email from IN to and the results (8/10) are different than those from my regular email (10/10):

It seems to be a problem with SPF and the return address but I cannot figure out what I am doing wrong.

If anyone could shed some light on this I would be really grateful.

It looks like you need to setup SPF and DKIM, your email provider should be able to help.

Thanks for the response.

I have both a DKIM and an SPF record but not sure why they pass for an email sent normally from my mail client but not from IN.