How to avoid mail looping when using email forwarding from one account to other reciprocally?
I am creating two accounts, namely firstname.lastname@example.org and email@example.com.
On the directur's account, I have added an email forwarding firstname.lastname@example.org, so email to email@example.com also
forwarded to firstname.lastname@example.org.
As well as on the john's account, I have added an email forwarding email@example.com, so email to firstname.lastname@example.org also
forwarded to email@example.com.
But it will cause mails looping:
email -> john -> directur -> john -> directur so on ...
As well as
email -> directur -> john -> directur -> john so on ...
Can we avoid this ?