Hey, I just received a 1 day warning for activity against player guidelines and I assume that it has to do with wayfarer as my pokemon go account is as clean as it can get. However, I have received no mail explaining why I received this warning. Is there anywhere I can find the reason for this and appeal it (since I have not done anything wrong in my opinion)? Or is there a mod that could explain me what the reason is? Thanks in advance!
Welcome to the forum 
If a warning is from Wayfarer you will definitely have been sent emails. It is from Pokemon Go, you might not have been sent emails. Please check the email account associated with your profile, or check all your email accounts if you are unsure which one is the right one. Check your spam as well.
These are what the Wayfarer emails look like (Image borrowed from @TjoeMi):
First of all, thanks for the quick response
I have checked all my mails, including spam, but I cannot find anything at all. Does it normally take a while for the mail to be sent?
Found the mail, thread can be closed. Thanks for the help!
You can appeal privately using link inside that email. You have 1 year redemption period where all your strike will be forgiven after 1 year of clean record