Solved. I knew this would happen. The act of writing it all out and including
the configuration output gave me the solution.
I am using lmtp to deliver mail from postfix to Dovecot. I was missing the
notify and replication plugins from 20-lmtp.conf
They were only present in 10-mail.conf as
mail_plugins = notify replication
Now, adding to 20-lmtp.conf:
protocol lmtp {
mail_plugins = sieve notify replication
}
Works fine now. Hope this helps someone else.
Cheers
James
> On 31 Oct 2020, at 14:40, James Pattinson wrote:
>
> Hi,
>
> I have just built a new pair of similar machines both running CentOS 8.2
> (selinux disabled) and Dovecot 2.3.8 (9df20d2db).
>
> One machine is a VPS (host A) and one is on my home network (host B). The
> idea is that they are set up in a master/master config with Dovecot
> replication.
>
> I seem to have this 95% working but there is one strange issue I can’t work
> out.
>
> Currently B is a perfect replica of A. I have pointed an instance of
> Thunderbird at it, and I can see all my mails. If I delete any mails or
> change any flags, I see the same changes almost instantly on the A side.
>
> PROBLEM: if host A receives a new mail, I don’t see it on B until I do
> ‘something’ to change metadata, for example deleting any random email, or
> marking an email as read on EITHER side causes the new email to appear almost
> instantly on the B side.
>
> I would have expected emails on B to appear immediately. Am I doing something
> wrong?
>
> Extra info - my mailboxes are in Maildir format with single OS user (vmail).
> I have about 4000 emails in the Inbox and about 30k in other folders.
>
> There are only 5 users and I’m using passdb as the very simple backend.
>
> Replication is via doveadm on a specified port (not SSH). Some output from
> dovecot -n is below.
>
> Cheers
> James
>
> HOST A
>
> # 2.3.8 (9df20d2db): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.8 (b7b03ba2)
> # OS: Linux 4.18.0-193.28.1.el8_2.x86_64 x86_64 CentOS Linux release 8.2.2004
> (Core) xfs
> # Hostname: hosta.domain
> auth_mechanisms = plain login
> doveadm_password = # hidden, use -P to show it
> doveadm_port = 4040
> first_valid_uid = 1000
> mail_debug = yes
> mail_home = /srv/vmail/%u
> mail_location = maildir:/srv/vmail/%u
> mail_plugins = 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 index ihave
> duplicate mime foreverypart extracttext
> mbox_write_locks = fcntl
> namespace inbox {
> inbox = yes
> location =
> mailbox Drafts {
>auto = subscribe
>special_use = \Drafts
> }
> mailbox Junk {
>auto = subscribe
>special_use = \Junk
> }
> mailbox Sent {
>special_use = \Sent
> }
> mailbox "Sent Messages" {
>special_use = \Sent
> }
> mailbox Trash {
>auto = subscribe
>special_use = \Trash
> }
> prefix =
> }
> passdb {
> args = scheme=BLF-CRYPT username_format=%u /etc/dovecot/users
> driver = passwd-file
> }
> plugin {
> mail_replica = tcp:b.b.b.b:4040
> sieve = file:~/sieve;active=~/.dovecot.sieve
> sieve_before = /var/mail/SpamToJunk.sieve
> }
> protocols = imap lmtp
> service aggregator {
> fifo_listener replication-notify-fifo {
>group = root
>mode = 0660
>user = vmail
> }
> unix_listener replication-notify {
>group = root
>mode = 0660
>user = vmail
> }
> }
> service auth {
> unix_listener /var/spool/postfix/private/auth {
>group = postfix
>mode = 0600
>user = postfix
> }
> }
> service doveadm {
> inet_listener {
>port = 4040
> }
> }
> service lmtp {
> unix_listener /var/spool/postfix/private/dovecot-lmtp {
>group = postfix
>mode = 0600
>user = postfix
> }
> }
> service replicator {
> process_min_avail = 1
> unix_listener replicator-doveadm {
>mode = 0600
>user = vmail
> }
> }
> ssl = required
> ssl_cert = ssl_cipher_list = PROFILE=SYSTEM
> ssl_dh = # hidden, use -P to show it
> ssl_key = # hidden, use -P to show it
> ssl_min_protocol = TLSv1.2
> ssl_prefer_server_ciphers = yes
> userdb {
> args = username_format=%u /etc/dovecot/users
> default_fields = uid=vmail gid=mail home=/srv/vmail/%u
> driver = passwd-file
> }
> protocol lmtp {
> mail_plugins = sieve
> }
> protocol lda {
> mail_plugins = notify replication sieve
> }
>
> HOST B
>
> # 2.3.8 (9df20d2db): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.8 (b7b03ba2)
> # OS: Linux 4.18.0-193.28.1.el8_2.x86_64 x86_64 CentOS Linux release 8.2.2004
> (Core) ext4
> # Hostname: hostb
> auth_mechanisms = plain login
> doveadm_password = # hidden, use -P to show it
> doveadm_port = 4040
> first_valid_uid = 1000
> mail_debug = yes
> mail_home = /srv/vmail/%u
> mail_location = maildir:/srv/vmail/%u
> mail_plugins = notify replication
> managesieve_notify_cap
