I am administrate a SP-farm with multiple webApps. Outgoing e-mail is configured and works fine. There is only one exception - the access request mails. I found this
Problem of all is, that every IP is already listed in exchange and the AUTH-mode is "anonymous", so there is no authentication required. The last few hours I tried to find something in the exchange logs or ULS but nothing. I also checked the quarantine and spam - nothing. I added the sender address as an exception in a rule - no mail.
And no, there is no AD group in the field for the receiver email. There is only one normal email address entered.
So... I don´t know how to get a step forward. Could anyone help me please?
Thanks for any effort!