Hi,
But as Aki said, doveconf -n is crucial, especially since you upgraded from an older version.
Thank you for your response. Unfortunately, I missed the first e-mail a few days ago.
Interestingly it does no longer happen since a few days. We're seeing one IMAP and one IMAP-LOGIN process per connection now which is the expected behavior.
It's completely unclear to me why this does not longer happen now.
Anyway, here's the doveconf output in case you spot something.
Thank you, Wolfgang
# 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-11-amd64 x86_64 Debian 10.7 # Hostname: static...... auth_mechanisms = scram-sha-1 digest-md5 cram-md5 plain auth_worker_max_count = 300 default_process_limit = 200 first_valid_uid = 1000 hostname = ....... log_timestamp = "%Y-%m-%d %H:%M:%S " mail_location = maildir:~/Maildir mail_plugins = quota acl mail_privileged_group = mail mail_server_admin = postmaster@....... 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 index ihave duplicate mime foreverypart extracttext editheader 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 = separator = / type = private } namespace zzzzz { list = children location = maildir:%%h/Maildir-xxx:INDEX=~/index_shared/%%u prefix = shared/%%u/ separator = / subscriptions = no type = shared } passdb { args = /etc/dovecot/shadow driver = passwd-file } plugin { acl = vfile acl_shared_dict = file:/var/mail/shared-%d/shared-mailboxes quota = maildir:User quota quota_rule = *:storage=1G quota_warning = storage=90%% quota-warning 90 %u sieve = file:~/sieve;active=~/dovecot.sieve sieve_extensions = +editheader } postmaster_address = postmaster@xxxxxxx.de protocols = " imap sieve sieve" service auth-worker { chroot = yes user = $default_internal_user } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } } service imap-login { vsz_limit = 64 M } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } ssl_cert = :storage=1G driver = passwd-file } protocol lda { mail_plugins = quota acl sieve } protocol imap { mail_max_userip_connections = 32 mail_plugins = quota acl imap_quota imap_acl }