Howdy, Googling:

dovecot: auth-worker(default): pam_start() failed: Critical error - immediate abort dobbeltganger dovecot: auth-worker(default): pam(user,1.2.3.4): lookup service=dovecot dobbeltganger out of memory [4543]

returns just 3 references.

Examining memory server side reveals use of virtual memory but not 100%

OS: Ubuntu 14.04 client 10.04 server-side. Email client: Thunderbird (Thunderbird prompts for the password which has worked for years).

dovecot -n

# 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 ssl: required verbose_ssl: yes login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-logina login_processes_count: 5 login_max_processes_count: 256 mail_max_userip_connections: 40 mail_privileged_group: mail mail_location: maildir:~/Maildir mail_debug: yes mbox_write_locks: fcntl dotlock auth default: realms: davidwbrown.name, karlbrown.name default_realm: dobbeltganger.com username_format: %n verbose: yes debug: yes debug_passwords: yes passdb: driver: pam userdb: driver: passwd socket: type: listen client: path: /var/spool/postfix/private/auth mode: 432 user: postfix group: postfix