Emails not being received

Hello,

I’ve not being receiving email notifications when people leave comments on my blog, so I installed this plug in to see if I could diagnose it. However, I still haven’t managed.

I contacted my hosting company, who claim that they receive email sent using the plug in. However, I have tried 7 different email addresses (one hotmail.com, one outlook.com, two gmail.com and three using accounts on my own domains), and none received the email.

All email accounts are working fine, and I’ve checked spam/junk folders in all cases.

Anyone any suggestions? Thanks