Hello,
I wan't to ask if it is maybe possible to turn off the Undelivered Mail Returned to Sender for a specific email-adress?
I want to disable this for ex. my newsletter@domain.tld if the email adresse don't exists anymore or other errors?
Thank you 
Thank you, but i think this is global and not only for one specific email-adress?
At first, it would be great if you explain us why you want do such a thing...
At first, it would be great if you explain us why you want do such a thing...
Sure:
I have a newsletter who sends 10.000 Emails and if there are ex. 2500 emailadresses that are not existing anymore i get a lot of emails back with Undelivered Mail Returned to Sender on ex. newsletter@domain.tld, so i only want to disable it for newsletter@domain.tld
To resume, you're sending thoussain of mails by closing your eyes to inexistent recipients... If you want have your server blacklisted, that is the best thing to do 
I'll check if it is possible to ignore bounce messages for a specific sender but hey, be aware that it is really not the best thing to do.
An alternative would be to verify if the recipients exist. http://www.postfix.org/ADDRESS_VERIFICATION_README.html but I never used that...
To resume, you're sending thoussain of mails by closing your eyes to inexistent recipients... If you want have your server blacklisted, that is the best thing to do
Yes but i can't do anything there, because that recipents have put there emailadresse on it on registration-form (Community), so i can not really check it.
I'll check if it is possible to ignore bounce message for a specific sender but key, be aware that it is really not the best thing to do.
Thank you and i know that this is not very a good thing, but its very annoying if i receive so many rejects
I've edited my answer. Please read it again
Thank you, i will have a look @ that
Yes but i can't do anything there, because that recipents have put there emailadresse on it on registration-form (Community), so i can not really check it.