[Local address contains control or whitespace] error Enable Now Manager Messages

[beyreli]

Hi folks, 

Whenever I try to sen message to an user [Local address contains control or whitespace] error pops up. There is no problem with users e-mail such as space or wrong character. 

All advices are welcome

[DirkManuel]

If you go to Administration > Users and filter on Wrong Email does anything show up? What about exporting to Excel and running an autoformat that checks for non-valid characters in the email? If nothing, and you can't narrow it down yourself (e.g. too many users in the ext_LEARNER OU/role) open a ticket.