Recipient address rejected: User unknown

Ismael.Humbert a posé une question...
Hello,
When I try to send a message to my son at ismael.humbert@riseup.net, it does not work. the error is "5.1.1 : Recipient address rejected: User unknown".
I dont understand because the web mail client can be opened correctly...
Thank you for your aswer.
Vote | 0
Cyanolyca turcosa ecua4944
Urraca De Cuello Negro a répondu...
Hi,

There was a problem from our side. We have been removing the ability to create username with dots in them, which lead you hit a bug. The bug should be fixed and you can use the account as you want it
Vote | 1
Ismael.Humbert a répondu...
Thanks a lot!
Vote | 0