Hi there,
We are using this plugin with contact form 7 to set up email.
Actual problem we are facing while using yahoo smtp.
Send a Test Email is working and mail is going to inbox, but while we are checking using contact form 7 it's not working.
Same contact form with gmail smtp setup is working and mail is going to inbox.
Let me know what is the actual problem. Is this the problem in plugin or server? As gmail SMTP is working while yahoo SMTP is not.