Error creating user: Invalid email address

Good morning,
I have this problem: I can not create users or enter the administrator password … I always get the same error: Error creating user: Invalid email address.

Can anyone help me please?

Thanks so much.

Please use the search function in this forum:


here is what I found by simply entering your error message “invalid mail address” in to the search:

I solved that by looking in the forum … Thanks! now I have this error:

There was a problem sending the email. Check your settings. (Error: Address in mailbox given [info @] does not comply with RFC 2822, 3.6.2.)