On 05/01/2016 01:57 AM, Leon Fauster wrote: > Am 01.05.2016 um 06:43 schrieb Alice Wonder <alice at domblogger.net>: >> On 04/30/2016 08:56 PM, Gordon Messmer wrote: >>> On Sat, Apr 30, 2016 at 12:44 PM, Alice Wonder <alice at domblogger.net> wrote: >>>> >>>> For e-mail sent to people, yes. >>>> >>>> But for what usernames are allowed when creating an account, I don't see why >>>> blacklisting characters that are not allowed in a username is a standards >>>> problem. >>> >>> >>> That's not how the RFC rules are defined. But, rather than argue that >>> point at length, I'd point out that Open Group standards for usernames >>> are simple and will comply with the SMTP RFCs: >>> http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap03.html#tag_03_426 >>> >>> That is, [A-Za-z0-9._][A-Za-z0-9._-] >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> https://lists.centos.org/mailman/listinfo/centos >>> >> >> I think there is a mis-understanding. >> >> All I was looking for was if there was a common set of characters typically blasted from new usernames *on the domain being set up* >> >> I have no desire to refuse delivery to any valid e-mail address. >> >> For example, avoiding spaces in usernames for addresses on the system is handy because it avoids bugs where the path to the mailbox on the filesystem isn't properly quoted. >> >> So user names on the system won't be allowed to have spaces even though they are legal when within quotes or escaped. >> >> That's all I was looking for, was experience on what legal characters to avoid allowing users to have for the mailbox portion of their e-mail address, the username. >> >> Of course I have no desire to restrict who they can send to if it is a legal address. > > > blacklisting is not a good practice, use the suggested whitelist ... I think this is my autism coming in to play, I think what is very clear to me I just am not able to adequately communicate because clearly people are not even remotely grasping what I am trying to convey.