Monday, May 24, 2021, 8:16:53 PM, Dominic Raferd wrote:
Dominic Raferd> On 24/05/2021 11:01, Benny Pedersen wrote: >> On 2021-05-24 11:47, Dominic Raferd wrote: >>> On 24/05/2021 10:33, Benny Pedersen wrote: >>>> On 2021-05-24 08:02, Dominic Raferd wrote: >>>>> On 24/05/2021 02:10, Jim Popovitch wrote: >>>>>> On Mon, 2021-05-24 at 03:00 +0200, Fourhundred Thecat wrote: >>>>>>> I see following lines in my log (pasted below). What do these >>>>>>> errors >>>>>>> mean? Is somebody sending garbage characters to my server? >>>>>> Same here >>>>>> >>>>>> >>>>>> May 24 00:25:11 mx2 postfix/trivial-rewrite[13453]: warning: >>>>>> midna_domain_to_ascii_create: Problem translating domain >>>>>> "اختبار- >>>>>> القبول-العالمي.شبكة" to ASCII form: >>>>>> UIDNA_ERROR_DISALLOWED >>>>> +1. I added a new line to my fail2ban postfix jail to catch this >>>>> event >>>>> (based on the succeeding smtpd log entry): >>>>> >>>>> mdre-normal=... >>>>> ^warning: Illegal address syntax from [^[]*\[<HOST>\] in MAIL >>>>> command: >>>> symtom solving, is postconf -nf hard ? >>>> >>>> i like to know if smtputf8 is enabled or not >>>> >>>> is glibc support iconv, is idn supported on the host ?, it imho a >>>> build >>>> error not a postfix error >>>> >>>> other then that i just like to know more >>> since you ask: >>> >>> # postconf -nf|grep utf >>> >>> strict_smtputf8 = yes >>> >>> Standard postfix 3.4.13 build on Debian (Ubuntu 20.04). My glibc is >>> Ubuntu GLIBC 2.31-0ubuntu9.3, I don't know how to test for its iconv >>> support. Never had such log message before this weekend; I assume the >>> cause was malign. >> >> my own "postconf -d | grep utf" >> >> smtputf8_autodetect_classes = sendmail, verify >> smtputf8_enable = no >> strict_smtputf8 = no >> >> unless ubuntu have backports on glibc its unstable >> >> https://packages.gentoo.org/packages/sys-libs/glibc >> >> i have postfix 3.6 Dominic Raferd> # postconf -d|grep utf Dominic Raferd> smtputf8_autodetect_classes = sendmail, verify Dominic Raferd> smtputf8_enable = ${{$compatibility_level} < {1} ? {no} : {yes}} Dominic Raferd> strict_smtputf8 = no Dominic Raferd> and I set: Dominic Raferd> # postconf -nf compatibility_level Dominic Raferd> compatibility_level = 3 These logs also seen on FreeBSD 12.1-RELEASE-p6 with Postfix 3.5.8,1 compatibility_level = 2 smtputf8_autodetect_classes = sendmail, verify smtputf8_enable = ${{$compatibility_level} < {1} ? {no} : {yes}} strict_smtputf8 = no Only one occurrence in last 24 hours. Same source IP [52.39.45.118] as reported earlier. Cheers, Phil
