On 29/01/2024 23:23 EET Steve Moser via dovecot dovecot@dovecot.org wrote: Hello, I am hoping that you can help me. I am running this command on my main email server, one way backup/ sync to the backup server. sudo doveadm sync -1 -A remote:root@x.x.x.x x.x.x.x is my remote server. I will add a new email on the main, run the command and it shows up on the backup. - Great! Now I delete that email from the main, run the command and the email is removed from the backup. That should not delete anything from the backup, correct? I prefer Not to delete anything, only update/add. Do you see what I am doing wrong? Thank You!!!! Here my installed versions dovecot-core 1:2.3.16+dfsg1-3ubuntu2.2 dovecot-imapd 1:2.3.16+dfsg1- 3ubuntu2.2 dovecot-lmtpd 1:2.3.16+dfsg1- 3ubuntu2.2 dovecot-mysql 1:2.3.16+dfsg1- 3ubuntu2.2 dovecot-pop3d 1:2.3.16+dfsg1- 3ubuntu2.2 postfix 3.6.4-1ubuntu1.2 amd64 High-performance mail transport agentpostfix- mysql 3.6.4-1ubuntu1.2 amd64 MySQL map support for Postfixpostfix-policyd-spf-python 2.9.3-1 all Postfix policy server for SPF checking Hello, I am hoping that you can help me. I am running this command on my main email server, one way backup/ sync to the backup server. sudo doveadm sync -1 -A remote:root@x.x.x.x x.x.x.x is my remote server. I will add a new email on the main, run the command and it shows up on the backup. - Great! Now I delete that email from the main, run the command and the email is removed from the backup. That should not delete anything from the backup, correct? I prefer Not to delete anything, only update/add. Do you see what I am doing wrong? Thank You!!!! Sync will synchronize the state of your mailbox, including deletions. One way sync only promises not to touch the source mailbox. Aki