Hi All,

I have a problem with SASL authentification from postfix when more than 10 mails is sent from the same user simultaneously Postfix abort connection ( Connection lost to authentication server ). Dovecot log after the postfix error an error about connection lost also ( read EOF )

I don't seem to find a parameter for a maximum of connection for the auth process ( ther's one for imap, pop, .. ) but none for auth.

Do you have an idea of a way to solve this problem or to have better information ?

result of Docecot -n

# 2.2.13: /etc/dovecot/dovecot.conf # OS: Linux 3.15.6-gentoo-xxxx-std-ipv6-64 x86_64 Gentoo Base System release 2.2 auth_default_realm = aprogsys.com auth_mechanisms = plain login auth_username_format = %Ln dict { acl = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext } disable_plaintext_auth = no dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u first_valid_uid = 1001 lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_access_groups = dovecot mail_location = mdbox:~/mdbox mail_plugins = " acl notify replication" 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 list = 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 = separator = / } passdb { args = * driver = pam } plugin { acl = vfile acl_anyone = allow acl_shared_dict = proxy::acl antispam_backend = DSPAM antispam_debug_target = syslog antispam_dspam_args = --source=error;--signature=%%s;--user;%n antispam_dspam_binary = /usr/bin/dspam antispam_signature = X-DSPAM-Signature antispam_spam = SPAM antispam_trash = Trash antispam_verbose_debug = 1 mail_replica = remote:root@192.168.1.7 replication_dsync_parameters = -d -U sieve = ~/.dovecot.sieve sieve_before = /var/lib/dovecot/sieve sieve_default = /var/lib/dovecot/sieve/spam.sieve sieve_dir = ~/sieve } protocols = imap pop3 lmtp sieve replication_max_conns = 2 service aggregator { fifo_listener replication-notify-fifo { mode = 0666 } unix_listener replication-notify { mode = 0666 } } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { mode = 0777 } user = root } service dict { unix_listener dict { mode = 0666 } } service imap-login { process_min_avail = 4 service_count = 0 vsz_limit = 256 M } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service replicator { process_min_avail = 1 unix_listener replicator-doveadm { mode = 0666 } } ssl_cert =