Fatal: master: service(imap): child 20258 killed with signal 6 (core not dumped - set service imap { drop_priv_before_exec=yes })

[CJ Keist]

Thanks for the reply. I have seen threads about setting the 
mail_max_userip_connections, I have set this to 5000 and still people 
getting the exceeding connections errorl


root at mail2:/userM/mail-services/dovecot/sbin# ./dovecot -n
# 2.2.13: /userM/mail-services/dovecot/etc/dovecot/dovecot.conf
# OS: SunOS 5.11 i86pc
auth_failure_delay = 5 secs
auth_mechanisms = plain login cram-md5
auth_worker_max_count = 3000
base_dir = /userM/mail-services/dovecot/var/run/dovecot/
disable_plaintext_auth = no
hostname = mail2.engr.colostate.edu
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope 
encoded-character vacation subaddress comparator-i;ascii-numeric 
relational regex imap4flags copy include variables body enotify 
environment mailbox date ihave duplicate
namespace inbox {
   inbox = yes
   location =
   mailbox Drafts {
     special_use = \Drafts
   }
   mailbox Junk {
     special_use = \Junk
   }
   mailbox Sent {
     special_use = \Sent
   }
   mailbox "Sent Messages" {
     special_use = \Sent
   }
   mailbox Trash {
     special_use = \Trash
   }
   prefix =
}
passdb {
   driver = pam
}
passdb {
   driver = passwd
}
postmaster_address = cjay at engr.colostate.edu
service auth {
   unix_listener /var/lib/postfix/private/auth {
     mode = 0666
   }
   unix_listener auth-userdb {
     group = postfix
     mode = 0666
     user = postfix
   }
   user = root
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 993
     ssl = yes
   }
}
service pop3-login {
   inet_listener pop3 {
     port = 110
   }
   inet_listener pop3s {
     port = 995
     ssl = yes
   }
}
ssl_cert = </userM/mail-services/dovecot/etc/ssl/dovecot.pem
ssl_key = </userM/mail-services/dovecot/etc/ssl/privkey.pem
userdb {
   args = blocking=yes
   driver = passwd
}
protocol imap {
   mail_max_userip_connections = 5000
}
protocol lda {
   mail_plugins = sieve
}


On 7/10/14, 9:45 AM, Reindl Harald wrote:
>
>
> Am 10.07.2014 17:32, schrieb CJ Keist:
>> Another problem is people are getting error message from their clients stating
>> they have exceeded their number of connections.
>
> mail_max_userip_connections = 50
>
> well, how much folders do the have
>
> keep in mind that fpr IDLE you have one connection per user and folder
> 10 users with 10 folders behind the same NAT router are 100 connections
> from the same IP
>
>> On 7/10/14, 9:09 AM, CJ Keist wrote:
>>> Added info:  These errors seem to come from users using mbox format.
>>>
>>>
>>> On 7/10/14, 9:04 AM, CJ Keist wrote:
>>>> All,
>>>>     Just move our mail servers over to a new mail server running postfix
>>>> 2.11.1 and dovecot 2.2.13 and getting the subject line errors in my
>>>> /var/adm/files.  People are complaining of loosing their connections to
>>>> the mail server.
>>>>
>>>> I've been able to google this error but haven't found fix for this yet.
>>>>    NOt sure where to put the drop-priv option in the config files either.
>>>>
>>>> Any suggestions?
>>>>
>>>> Var adm message:
>>>> Jul 10 08:54:29 mail2 dovecot: [ID 583609 mail.crit] imap(chen): Fatal:
>>>> master: service(imap): child 20258 killed with signal 6 (core not dumped
>>>> - set service imap { drop_priv_before_exec=yes })
>>>>
>>>> Here is config output:
>>>>
>>>> root at mail2:/userM/mail-services/dovecot/sbin# ./dovecot -n
>>>> # 2.2.13: /userM/mail-services/dovecot/etc/dovecot/dovecot.conf
>>>> # OS: SunOS 5.11 i86pc
>>>> auth_failure_delay = 5 secs
>>>> auth_mechanisms = plain login cram-md5
>>>> auth_worker_max_count = 300
>>>> base_dir = /userM/mail-services/dovecot/var/run/dovecot/
>>>> disable_plaintext_auth = no
>>>> hostname = mail2.engr.colostate.edu
>>>> managesieve_notify_capability = mailto
>>>> managesieve_sieve_capability = fileinto reject envelope
>>>> encoded-character vacation subaddress comparator-i;ascii-numeric
>>>> relational regex imap4flags copy include variables body enotify
>>>> environment mailbox date ihave duplicate
>>>> namespace inbox {
>>>>     inbox = yes
>>>>     location =
>>>>     mailbox Drafts {
>>>>       special_use = \Drafts
>>>>     }
>>>>     mailbox Junk {
>>>>       special_use = \Junk
>>>>     }
>>>>     mailbox Sent {
>>>>       special_use = \Sent
>>>>     }
>>>>     mailbox "Sent Messages" {
>>>>       special_use = \Sent
>>>>     }
>>>>     mailbox Trash {
>>>>       special_use = \Trash
>>>>     }
>>>>     prefix =
>>>> }
>>>> passdb {
>>>>     driver = pam
>>>> }
>>>> passdb {
>>>>     driver = passwd
>>>> }
>>>> postmaster_address = cjay at engr.colostate.edu
>>>> service auth {
>>>>     unix_listener /var/lib/postfix/private/auth {
>>>>       mode = 0666
>>>>     }
>>>>     unix_listener auth-userdb {
>>>>       group = postfix
>>>>       mode = 0666
>>>>       user = postfix
>>>>     }
>>>>     user = root
>>>> }
>>>> service imap-login {
>>>>     inet_listener imap {
>>>>       port = 143
>>>>     }
>>>>     inet_listener imaps {
>>>>       port = 993
>>>>       ssl = yes
>>>>     }
>>>> }
>>>> service pop3-login {
>>>>     inet_listener pop3 {
>>>>       port = 110
>>>>     }
>>>>     inet_listener pop3s {
>>>>       port = 995
>>>>       ssl = yes
>>>>     }
>>>> }
>>>> ssl_cert = </userM/mail-services/dovecot/etc/ssl/dovecot.pem
>>>> ssl_key = </userM/mail-services/dovecot/etc/ssl/privkey.pem
>>>> userdb {
>>>>     args = blocking=yes
>>>>     driver = passwd
>>>> }
>>>> protocol imap {
>>>>     mail_max_userip_connections = 50
>>>> }
>>>> protocol lda {
>>>>     mail_plugins = sieve
>>>> }
>

-- 
C. J. Keist                     Email: cj.keist at colostate.edu
Systems Group Manager           Solaris 10 OS (SAI)
Engineering Network Services    Phone: 970-491-0630
College of Engineering, CSU     Fax:   970-491-5569
Ft. Collins, CO 80523-1301

All I want is a chance to prove 'Money can't buy happiness'