Registration question

210.48.94.198/~blackhil/
HikaShip Essential

hi there, i just have a quick question regarding the registration process - i did a test of buying a product and when the registration activation came through to the email address i sent it to, there was a red alert at the top saying 'suspected phishing'
is there anything i should set in my shop set up to prevent this? i don't want my customer's registrations going straight to their junk boxes or them thinking the site is dodgy.
thanks

Hi,

I suppose that the fact that your website URL is an IP address and not a domain name is probably the reason why it was flagged as a phishing email.
For the spam, I would recommend to test your email against mail-tester.com and follow their advices.