On 2022-09-22, Kai Bojens via Exim-users <exim-users@exim.org> wrote: > Hello there, > I have a new server which now has SMTPUTF8 enabled. I'm not sure why but > since then at least one Outlook client decided to stop using the IDN > form (xn--dmin-moa0i.example) and now tries to authenticate with the > UTF-8 domain. Researching this problem has led me to some questions: > > 1. How does exim handle UTF-8 in authentication data?
Authentication credentials have been 8-bit since forever, exim is 8-bit clean so, if a client offers an 8 bit credential (username, password, etc) exim will pass that on to the lookup or whatever is being used to check the credentials. > 2. How does exim handle the logging of such information? I searched the > logfile and noticed that the authentication information is logged with > UTF-8 in octal: > > (set_id=xyz@XXX\303\266nX\303\244XXX.xyz) These would be an escaped version of the bytes offered in the credential. there is no enforcement that the credential is valid UTF8. -- Jasen. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
