Also, FWIW...your doveadm command is missing quite a few options…here is mine…

[Jul-27 @ 15:11:57] > dovecot —version 2.3.10.1 (a3d0e1171)

[Jul-27 @ 15:22:39] > ls -l /usr/bin/doveadm -rwxr-xr-x. 1 root root 2949584 May 19 02:09 /usr/bin/doveadm

[Jul-27 @ 15:21:31] > doveadm usage: doveadm [-Dv] [-f <formatter>] <command> [<args>]

altmove [-u <user>|-A] [-S ] [-r] <search query> auth cache|login|lookup|test backup [-u <user>|-A] [-S ] [-fPRU] [-l <secs>] [-r <rawlog path>] [-m <mailbox>] [-g ] [-n <namespace> | -N] [-x <exclude>] [-s <state>] [-t <start date>] -d|<dest> batch [-u <user>|-A] [-S ] <sep> <cmd1> [<sep> <cmd2> [..]] config [doveconf parameters] copy [-u <user>|-A] [-S ] <destination> [user <source user>] <search query> deduplicate [-u <user>|-A] [-S ] [-m] <search query> dict get|inc|iter|set|unset director add|down|dump|flush|kick|map|move|remove|ring|status|up|update dump [-t <type>] <path> exec <binary> [binary parameters] expunge [-u <user>|-A] [-S ] [-m] <search query> fetch [-u <user>|-A] [-S ] <fields> <search query> flags add|remove|replace force-resync [-u <user>|-A] [-S ] [-f] <mailbox mask> fs copy|delete|get|iter|iter-dirs|metadata|put|stat help <cmd> import [-u <user>|-A] [-S ] [-U source-user] [-s] <source mail location> <dest parent mailbox> <search query> index [-u <user>|-A] [-S ] [-q] [-n <max recent>] <mailbox mask> instance list|remove kick [-a <anvil socket path>] <user mask>[|] log errors|find|reopen|test mailbox cache|cache|create|delete|list|metadata|mutf7|path|rename|status|subscribe|unsubscribe|update move [-u <user>|-A] [-S ] <destination> [user <source user>] <search query> oldstats dump|reset|top penalty [-a <anvil socket path>] [] process status proxy kick|list purge [-u <user>|-A] [-S ] pw [-l] [-p plaintext] [-r rounds] [-s scheme] [-t hash] [-u user] [-V] rebuild attachments reload replicator add|dsync-status|remove|replicate|status save [-u <user>|-A] [-S ] [-m mailbox] search [-u <user>|-A] [-S ] <search query> service status|stop sieve activate|deactivate|delete|get|list|put|rename sis deduplicate|find stats dump stop sync [-u <user>|-A] [-S ] [-1fPRU] [-l <secs>] [-r <rawlog path>] [-m <mailbox>] [-g ] [-n <namespace> | -N] [-x <exclude>] [-s <state>] [-t <start date>] -d|<dest> user [-a <userdb socket path>] [-x <auth info>] [-f field] [-e <value>] [-u] <user mask> [...] who [-a <anvil socket path>] [-1] [<user mask>] [] zlibconnect <host> [<port>]

On Jul 27, 2020, at 3:18 PM, Antonio Leding tech@leding.net wrote:

Fair enough but the command snippet I posted was taken directly from your earlier post dated Mon Jul 27 23:11:06 EEST 2020 and it does say “production1”…I just double-checked as well...

FWIW…the server order in the command you just pasted is the exact reverse from the Jul 27th post I mentioned above…

Here you appear to be exec’ing the command on prod2 and trying to pull from the remote of prod 1…your earlier post was exec’ing on prod1 and pulling from the remote of prod2…

...

On Jul 27, 2020, at 3:10 PM, Kishore Potnuru mailto:kishore.reachme@gmail.com> wrote:

I am executing the command from the new server. I was executing the command from production2 server only. It has the backup option, but whereas production1 doesn't have it. Though I am executing from production2, I am seeing the below error. Is it becasue production1 server doesn't have that option? Please let me know, if it is confusing.

The old version is:

[root@production2 ~]# dovecot --version 2.2.36 (1f10bfa63)

The New version is :

[root@production1 ~]# dovecot --version 2.0.9

I have executed the command from the new server:

================================= [root@production2 test.org.com http://test.org.com/]# doveadm backup -R -u kishore@test.org.com mailto:kishore@test.org.com remote:vmail@production1.baplc.com mailto:remote%3Avmail@production1.baplc.com vmail@production1.baplc.com mailto:vmail@production1.baplc.com's password: usage: doveadm [-Dv] [-f <formatter>] <command> [<args>]

altmove [-u <user>|-A] [-S ] <search query> auth [-a <auth socket path>] [-x <auth info>] <user> [<password>] config [doveconf parameters] director add|flush|map|remove|status dump [-t <type>] <path> expunge [-u <user>|-A] [-S ] <search query> fetch [-u <user>|-A] [-S ] <fields> <search query> force-resync [-u <user>|-A] [-S ] <mailbox> help <cmd> import [-u <user>|-A] [-S ] <source mail location> <dest parent mailbox> <search query> kick [-a <anvil socket path>] [-f] <user mask>[|] log find|reopen|test mailbox create|delete|list|mutf7|rename|status|subscribe|unsubscribe penalty [-a <anvil socket path>] [] purge [-u <user>|-A] [-S ] pw [-l] [-p plaintext] [-r rounds] [-s scheme] [-u user] [-V] reload search [-u <user>|-A] [-S ] <search query> sis deduplicate|find stop user [-a <userdb socket path>] [-x <auth info>] <user mask> [...] who [-a <anvil socket path>] [-1] [<user mask>] [] dsync-local(kishore@test.org.com mailto:kishore@test.org.com): Error: read(vmail@production1.baplc.com mailto:vmail@production1.baplc.com) failed: EOF (version not received) dsync-local(kishore@test.org.com mailto:kishore@test.org.com): Error: Remote command returned error 1: ssh -lvmail production1.baplc.com http://production1.baplc.com/ doveadm dsync-server -ukishore@test.org.com mailto:ukishore@test.org.com

[root@production2 test.org.com http://test.org.com/]#

=================================

On Mon, Jul 27, 2020 at 10:55 PM Antonio Leding mailto:tech@leding.net> wrote: Not sure if this matters but the prompt when attempting the “doveadm backup” command shows it to be a “production" server…

[root at production1 https://dovecot.org/mailman/listinfo/dovecot test.org.com http://test.org.com/]# doveadm backup -R -u kishore at test.org.com https://dovecot.org/mailman/listinfo/dovecot remote:vmail at production2.baplc.com https://dovecot.org/mailman/listinfo/dovecot

...that would seem to me to indicate the old box. If so, then per Kishore’s earlier posts, the machine where this is being attempted is running 2.0.9…not 2.2.36

Maybe nothing but thought I would mention it…

...

On Jul 27, 2020, at 2:50 PM, Sami Ketola mailto:sami.ketola@dovecot.fi> wrote:

...

On 28. Jul 2020, at 0.10, Kishore Potnuru mailto:kishore.reachme@gmail.com> wrote:

Yes. Please find the details of the servers below. I am executing the command from one of the new servers.

I find it very hard to believe this. Shall I look at the version control when backup was added as option to doveadm?

2.2.36 has it:

[root@ketola ~]# dovecot --version 2.2.36.8 (0c9d56b41) [root@ketola ~]# doveadm backup doveadm backup [-u <user>|-A] [-S ] [-fPRU] [-l <secs>] [-r <rawlog path>] [-m <mailbox>] [-g ] [-n <namespace> | -N] [-x <exclude>] [-s <state>] [-t <start date>] -d|<dest>

Sami