Custom Contact Form and Postman SMTP, still no emails

Hello,

So I am working with a photographer who is a little set in their ways and since the last update has been having some issues that I have been working through but I am unable to solve this last one and figured I would poll the audience.

In the past her contact form emails were receiving just fine via this pipeline –
User Submits -> Email sent to @domain.com email -> blue host forwards this to @snet.com email

In September she realized that she was no longer getting her emails consistently and asked for help with this. We looked first at the theme as a potential cause. We deactivated the theme and still had a the problem. We then went 1 by 1 through the plugins and found that she was using the Comet Cache plugin and that was not allowing the contact form to send out to the @domain.com email. We removed comet cache and started using Custom Contact Forms (this plugin logs all submitted entries so they can be retrieved if necessary) and Postman SMTP to override WordPress’ wp_mail() function to make use of the SMTP protocol.

We started consistently receiving the submitted forms on her @domain.com email but we only get an occasional forwarded copy in the .snet.com email. I am of the mind that it is within SNET’s pre-spam filter as they are on yahoo.com’s servers (snet became at&t which was bought out by yahoo).

She doesn’t want to move to her @domain.com email at all and wants to continue using the @snet.com email and I have not been able to solve the issue. Any ideas?