Mike, I’m having the exact same issue on macOS X 10.13.6 (High Sierra). I’ve installed Dovecot using Homebrew. The number after ‘Setgroups’ is the Group ID of the user you’ve specified. Log entry for me: Aug 28 11:57:21 imap-login: Info: Login: user=mailto:user1@bordo.com.au>, method=PLAIN, rip=::1, lip=::1, mpid=57665, secured, session= Aug 28 11:57:21 imap(user1)<57665>: Fatal: setgroups(mail,6) failed: Too many extra groups Aug 28 12:00:45 master: Warning: Killed with signal 15 (by pid=71449 uid=0 code=unknown 0) I managed to get it to work my changing default_login_user and default_internal_user to me my username. Obviously not ideal! However it was the only way I could get it not to give the setgroups error. I spent ages trying with _dovecot and _dovenull to no avail. id _dovecot uid=214(_dovecot) gid=6(mail) groups=6(mail), … and a few more id _dovenull uid=227(_dovenull) gid=227(_dovenull) groups=227(_dovenull),12(everyone),61(localaccounts),703(com.apple.sharepoint.group.3),702(com.apple.sharepoint.group.2),701(com.apple.sharepoint.group.1),100(_lpoperator) Dovecot 2.3.2.1. Thanks, James.

On 11 Aug 2018, at 5:08 am, Mike Makuch <1mikemakuch@gmail.com mailto:1mikemakuch@gmail.com> wrote:

I found and tried this work around on the man page: https://www.unix.com/man-page/all/5/ngroups_max/ https://www.unix.com/man-page/all/5/ngroups_max/ but I still get the same "Too many extra groups" error even when I start dovecot with the above program to limit the # of groups. I suspect that dovecot is adding a number of groups when it starts up.

I've hacked a work around to get it working for me on my laptop:

diff --git a/src/lib/restrict-access.c b/src/lib/restrict-access.c

@@ -224,7 +224,12 @@ static void fix_groups_list(const struct restrict_access_settings *set,

- if (setgroups(gid_count, gid_list) < 0) {

+ if (setgroups(gid_count > NGROUPS_MAX ? 16 : gid_count, gid_list) < 0) { if (errno == EINVAL) { i_fatal("setgroups(%s) failed: Too many extra groups", set->extra_groups == NULL ? "" :

and this works. I'm not sure what the right solution is for a PR. Any suggestions?

Thanks

Mike

On 8/10/18 11:04, Aki Tuomi wrote:

...

Is the user member of mail group?

--- Aki Tuomi Dovecot oy

-------- Original message -------- From: Mike Makuch <1mikemakuch@gmail.com> mailto:1mikemakuch@gmail.com Date: 10/08/2018 19:02 (GMT+02:00) To: Aki Tuomi mailto:aki.tuomi@dovecot.fi Cc: dovecot@dovecot.org mailto:dovecot@dovecot.org Subject: Re: dying on osx

Maybe an old problem that has resurfaced???

https://bugzilla.samba.org/show_bug.cgi?id=8773 https://bugzilla.samba.org/show_bug.cgi?id=8773 Mike

On 8/10/18 10:54, Aki Tuomi wrote:

...

I have to see if this is reproducible outside mac.

--- Aki Tuomi Dovecot oy

-------- Original message -------- From: Mike Makuch <1mikemakuch@gmail.com> mailto:1mikemakuch@gmail.com Date: 10/08/2018 18:46 (GMT+02:00) To: Aki Tuomi mailto:aki.tuomi@dovecot.fi Subject: Re: dying on osx

I did find that page and tried a few things there. My config has all of the settings there except 3:

mail_access_groups = mail mbox_read_locks = fcntl mbox_write_locks = fcntl

I add them to my config, restart and get the same abort

20180810-103849 imap(mkm)<79213>: Fatal: setgroups(mail,505) failed: Too many extra groups

I've tried numerous other settings as well.

Thanks for any further advice

Mike

On 8/10/18 08:45, Aki Tuomi wrote:

...

Can you try this config and report back?

https://superuser.com/questions/957272/dotlock-permissions-problems-with-dov... https://superuser.com/questions/957272/dotlock-permissions-problems-with-dov...

Aki

...

On 10 August 2018 at 16:39 Mike Makuch <1mikemakuch@gmail.com> mailto:1mikemakuch@gmail.com wrote:

OSX 10.13.6 High Sierra, dovecot 2.3.2.1

dovecot starts up and runs but dies as soon as my mail client makes a request with log and config below.

And advice appreciated.

Thanks

Mike

20180810-083730 auth: Debug: auth client connected (pid=77432)

20180810-083730 auth: Debug: client in: AUTH 1 PLAIN service=imap secured session=xo1p2BRzZNd/AAAB lip=127.0.0.1 rip=127.0.0.1 lport=143 rport=55140 20180810-083730 auth: Debug: client passdb out: CONT 1 20180810-083730 auth: Debug: client in: CONT 1 AG1rbQBta20xMjM= (previous base64 data may contain sensitive data) 20180810-083730 auth: Debug: static(mkm,127.0.0.1,): lookup 20180810-083730 auth: Debug: client passdb out: OK 1 user=mkm host=localhost nopasswd=y 20180810-083730 auth: Debug: master in: REQUEST 4201906177 77432 1 b8126b4b71be2959fc7716888eccc566 session_pid=77433 request_auth_token 20180810-083730 auth-worker(77426): Debug: passwd(mkm,127.0.0.1,): lookup 20180810-083730 auth: Debug: master userdb out: USER 4201906177 mkm system_groups_user=mkm uid=503 gid=20 home=/Users/mkm auth_token=4d2bb44168df3d63e4e1bb352e59de632bc7da49 20180810-083730 imap-login: Info: Login: user=<mkm>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=77433, secured, session= 20180810-083730 imap(mkm)<77433>: Fatal: setgroups(505) failed: Too many extra groups

# doveconf -n # 2.3.2.1 (0719df592): /usr/local/etc/dovecot/dovecot.conf # OS: Darwin 17.7.0 x86_64 # Hostname: pine auth_debug = yes auth_debug_passwords = yes default_internal_user = _dovecot default_login_user = _dovenull disable_plaintext_auth = no listen = 127.0.0.1 log_path = /var/log/dovecot log_timestamp = "%Y%m%d-%H%M%S " mail_debug = yes mail_gid = staff mail_location = mbox:~/Mail:INBOX=/var/mail/%u mail_privileged_group = mail mail_uid = _dovecot passdb { args = password=*** host=localhost nopasswd=y driver = static } passdb { args = login driver = pam } protocols = imap service auth { user = root } service imap-login { inet_listener imap { address = * port = 143 } } ssl = no userdb { driver = passwd }