I'm experiencing a persistent "530 error" when trying to configure EmailIt as my custom SMTP.

Even though my "From email" is correctly set to my authorized custom domain, EmailIt rejects the test/live email, stating there's a domain mismatch. I suspect the DM Champ system might be accidentally passing my main account login email in the background headers (Envelope Sender) instead of the custom domain.

I have already sent the full details and screenshots directly via WhatsApp. Please kindly check it out. Thank you!