Hi,
A customer of our company is unable to send emails to a specific user in our domain (inbound). The weird thing is that this customer can email to other users in our domain but not to this specific one. We run outlook in the 365 environment so i checked on blocked messages etc... but i can't find any problems there
Error message: seris-group.be #5.0.0 smtp; 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) #SMTP#
