No e-mail sent with SMTP

Hi, great plugin but I have a problem, I need to use WP Mail SMTP on my server, when WP Mail SMTP is active your plugin and I send a form with email verification i get the ” Could not send verification email ” message, if I deactivate email verification i get the message ” Form has been successfully submitted. Thank you. ” but I don’t get any email, if I deactive WP Mail SMTP or set it on PHP mail() function with e-mail verification on I recive the e-mail with verification code in spam, but I need to use SMTP. Can you please tell me if your plugin have problem with SMTP or if I have to set something to make it works or if there is another SMTP plugin that has no problem with your plugin? I thank you in advance for any help.

https://www.ads-software.com/plugins/caldera-forms/