Hi Eric, I have already searched the dovecot mailing list and found a few people who complain about this error exclusively with dovecot version 2.3.11.3 It seems a bug has been introduced on the behavior of the AUTH mechanism. On the mailing list they recommend patching the sources or upgrading to a later version. That's why I was asking how to upgrade.
Link <https://dovecot.markmail.org/search/?q=tried%20to%20use%20unsupported%20auth%20mechanism#query:tried%20to%20use%20unsupported%20auth%20mechanism+page:1+mid:bsmh73cxxpqkiza6+state:results> to the dovecot mailing list. Fabio Il giorno lun 31 gen 2022 alle ore 01:57 Eric Broch <ebr...@whitehorsetc.com> ha scritto: > hmmm... > > pretty much the same I have on my toaster. > > This is what is confusing: > > "-ERR [AUTH] Unsupported authentication method" and " method=USER" > > I've seen failures with 'method=digest-md5' or 'method=cram-md5' but never > user. > > Can you ask about this on the Dovecot mailing list and let us know what > they say? > > > On 1/30/2022 11:48 AM, Fabio Mecchia wrote: > > Hi, > this is the output : > > dovecot-2.3.11.3-12.qt.el7.x86_64 > ripmime-1.4.0.10-0.qt.el7.x86_64 > vpopmail-5.4.33-1.qt.el7.x86_64 > ezmlm-cgi-0.53.324-0.qt.el7.x86_64 > maildrop-2.9.1-2.qt.el7.x86_64 > mailman-debuginfo-2.1.12-20.qt.el7.x86_64 > dspam-libs-3.10.2-13.qt.el7.x86_64 > control-panel-0.5.1-1.qt.el7.x86_64 > qmt-release-1-7.qt.el7.noarch > autorespond-2.0.5-1.qt.el7.x86_64 > dovecot-pigeonhole-2.3.11.3-12.qt.el7.x86_64 > dspam-3.10.2-13.qt.el7.x86_64 > mailman-2.1.12-20.qt.el7.x86_64 > simscan-1.4.0-1.qt.el7.x86_64 > ezmlm-0.53.324-0.qt.el7.x86_64 > maildrop-devel-2.9.1-2.qt.el7.x86_64 > qmailadmin-1.2.16-3.2.qt.el7.x86_64 > dspam-mysql-3.10.2-13.qt.el7.x86_64 > qmailmrtg-4.2-3.qt.el7.x86_64 > daemontools-0.76-0.qt.el7.x86_64 > vqadmin-2.3.7-1.qt.el7.x86_64 > spamdyke-5.0.1-0.qt.el7.x86_64 > libsrs2-1.0.18-0.qt.el7.x86_64 > ucspi-tcp-0.88-0.qt.el7.x86_64 > libsrs2-devel-1.0.18-0.qt.el7.x86_64 > dspam-client-3.10.2-13.qt.el7.x86_64 > qmail-1.03-3.3.1.qt.el7.x86_64 > isoqlog-2.2.1-2.qt.el7.x86_64 > libdomainkeys-devel-0.69-1.qt.el7.x86_64 > > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> > Mail > priva di virus. www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> > > Il giorno dom 30 gen 2022 alle ore 19:37 Eric Broch < > ebr...@whitehorsetc.com> ha scritto: > >> What are you running on your machine? >> >> # rpm -qa | grep \\.qt >> >> report output back to the mailing list >> On 1/30/2022 10:49 AM, Fabio Mecchia wrote: >> >> So how can I upgrade dovecot? >> >> Il dom 30 gen 2022, 18:26 Eric Broch <ebr...@whitehorsetc.com> ha >> scritto: >> >>> The dovecot version we (qt) compile has the vpopmail driver in it, the >>> dovecot repos don't have that driver compiled in. If you use the many >>> domain version of qmail toaster that it would be okay, but using the stock >>> version then, no, you would run into trouble using the dovecot repo >>> versions. >>> >>> >>> On 1/30/2022 9:41 AM, Fabio Mecchia wrote: >>> >>> Hi, >>> still having problems, it's safe to update dovecot with this guide or I >>> risk to break something in Toaster setup? >>> >>> >>> https://doc.dovecot.org/installation_guide/dovecot_community_repositories/centos_packages/ >>> >>> >>> >>> >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>> Mail >>> priva di virus. www.avg.com >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>> >>> Il gio 27 gen 2022, 17:14 Fabio Mecchia <ktf4...@gmail.com> ha scritto: >>> >>>> In my /etc/dovecot/toaster.conf I Have: >>>> auth_mechanisms = plain login digest-md5 cram-md5 >>>> >>>> while the /etc/dovecot/conf.d/10-ssl.conf is the same as yours with : >>>> ssl = required >>>> >>>> I've found this on the dovecot mailing list : >>>> https://dovecot.org/pipermail/dovecot/2020-August/119760.html >>>> >>>> Regards >>>> Fabio >>>> >>>> >>>> >>>> Il giorno gio 27 gen 2022 alle ore 15:18 Eric Broch < >>>> ebr...@whitehorsetc.com> ha scritto: >>>> >>>>> This is my /etc/dovecot/toaster.conf dovecot authorization mechanisms: >>>>> >>>>> auth_mechanisms = plain login >>>>> On 1/27/2022 3:16 AM, Fabio Mecchia wrote: >>>>> >>>>> Hi everyone, >>>>> I have been having a weird problem connecting pop 3 to my corporate >>>>> server from Outlook and Thunderbird for about two weeks. >>>>> When the client tries to connect to the server, I got this error >>>>> message "-ERR [AUTH] Unsupported authentication method" and in the Dovecot >>>>> logs I found errors like "pop3-login: Info: Disconnected (tried to use >>>>> unsupported auth mechanism): user=<x...@xxxxxx.it>, method=USER, >>>>> rip=xxx.xxx.xxx.xxx, lip=xxx.xxx.xxx.xxx, TLS, session=<bXG42jTVxNtc3/SS> >>>>> " . >>>>> The strange thing is that the same client checks multiple boxes on the >>>>> same domain and not all of them give an error, also the error occurs >>>>> randomly, maybe for half a day it is impossible to download the mail and >>>>> then suddenly it works for a couple of hours. >>>>> Using the imap protocol there are no problems. >>>>> When the clients manage to connect I find this in the Dovecot logs >>>>> "pop3-login: Info: Login: user=<x...@xxxxxx.it>, method=DIGEST-MD5, >>>>> rip=xxx.xxx.xxx.xxx, lip=xxx.xxx.xxx.xxx, mpid=5510, TLS, >>>>> session=<+0htGDnVWPdc3/SS>", I don't know why on the same client without >>>>> changing anything the method switch from USER to DIGEST-MD5 >>>>> The server is up to date, dovecot version is 2.3.11.3 >>>>> >>>>> >>>>> Any suggestions are welcome >>>>> >>>>> Fabio Mecchia >>>>> >>>>> >>>>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>>>> Mail >>>>> priva di virus. www.avg.com >>>>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>>>> >>>>>
