[Dovecot] dovecot: imap-login: Maximum number of connections from user+IP exceeded (mail_max_userip_connections)

[David Brown]

Hi, has anyone seen this issue before as I have not.

I'm a long time dovecot user and I don't see anything in the config that 
should cause this.

The mail.log gets hit a lot of times with this same log message:

dovecot: imap-login: Maximum number of connections from user+IP exceeded 
(mail_max_userip_connections)

I have noted that it is more evident when I try to mass delete many 
messages.

Any ideas of how to diagnose this issue?

The dovecot -n follows:

# 1.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.34.1-rscloud x86_64 Ubuntu 10.04.4 LTS
log_timestamp: %Y-%m-%d %H:%M:%S
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/imap-login
login_processes_count: 5
login_max_processes_count: 256
mail_privileged_group: mail
mail_location: maildir:~/Maildir
mail_debug: yes
mbox_write_locks: fcntl dotlock
auth default:
   realms: davidwbrown.name
   default_realm: dobbeltganger.com
   username_format: %n
   verbose: yes
   debug: yes
   debug_passwords: yes
   passdb:
     driver: shadow
   userdb:
     driver: passwd
   socket:
     type: listen
     client:
       path: /var/spool/postfix/private/auth
       mode: 432
       user: postfix
       group: postfix