Dovecot - being dropped

[Maurizio Caloro]

Hello

Yesterday, I could not receive an email anymore when I looked in the logs
found the following errors:

 

*	Sep  7 06:04:44 mail dovecot: master: Warning: service(imap-login):
process_limit (100) reached, client connections are being dropped
*	Sep  7 06:06:41 mail dovecot: master: Warning: service(imap-login):
process_limit (100) reached, client connections are being dropped

 

If show the config i dont see any process_limits

 

Dovecot 2.2.13

 

root at mail:/var/log# dovecot -n

# 2.2.13: /etc/dovecot/dovecot.conf

# OS: Linux 3.16.0-6-amd64 x86_64 Debian 8.11

auth_mechanisms = plain login

auth_verbose = yes

disable_plaintext_auth = no

info_log_path = /var/log/mail.log

log_timestamp = %b %d %H:%M:%S Dovecot/

mail_access_groups = vmail

mail_location = maildir:~/Maildir

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 vironment mailbox date ihave

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 {

  args = /etc/dovecot/dovecot-sql.conf.ext

  driver = sql

}

plugin {

  sieve = ~/sieve/.dovecot.sieve

  sieve_dir = ~/sieve

}

postmaster_address = admin@

protocols = imap pop3 lmtp

service auth {

  unix_listener /var/spool/postfix/private/auth {

    group = postfix

    mode = 0660

    user = postfix

  }

  unix_listener auth-client {

    mode = 0660

    user = mail

  }

}

service lmtp {

  inet_listener lmtp {

    address = 127.0.0.1

    port = 24

  }

}

ssl_cert = </etc/dovecot/dovecot.pem

ssl_key = </etc/dovecot/private/dovecot.pem

userdb {

  args = /etc/dovecot/dovecot-sql.conf.ext

  driver = sql

}

protocol lda {

  mail_plugins = " quota sieve"

}

protocol imap {

  mail_plugins = " quota imap_quota"

}

root at mail:/var/log#

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