I am using magento 18.104.22.168 and using SMTP Pro Magento SMTP Email free extension i have configured it in right way before days ago my email was working good.but now after creating new oreder , invoice and after opening a order detail page and click on send email tab its giving message
The message has been sent. and also after order opening its showing message
the invoice email was sent can any body will tell me why this happening.
I have tried the bellow thing at my end.
1)I have checked all back end settings.