[Plugin: Postmark Email for WordPress by Yoast] No e-mails are sent when I activate the plugin, e-ma

Hi

I would really like to use this plugin, to send more reliable e-mail from my different websites.

I tried to install this plugin on one of my sites, but when I turned it on, no e-mails were sent, when it is off, e-mails are sent fine.

How can I troubleshoot and find out what is going on? Because I would really like to use this plugin to send reliable e-mails.

I use Gravityforms, and that is where some of the e-mails are sent from. I tried to make a new “clean” form, just for test purposes, but no e-mail came through postmarkapp.

I could try to change my API key, and get a new one from postmark, to see if that is the issue, but other than that, I have no clue as where or how I can troubleshoot this plugin, and find out why it is not working out for me.

One other issue, is that I have one form made in GF where I use hooks to get the entered data, and provide the users with a report based on the information that they have entered in the form. And send the report as an attachment (pdf) to an e-mail, that form actually broke when I activated the plugin, and would not even show the result page, I am suspecting because something went wrong when sending the e-mail, and that broke the form (code) form finishing and showing the result page.

Please advise me what to do.

Thanks,
Carsten

https://www.ads-software.com/extend/plugins/postmark-email-for-wordpress/