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Doesn't work for me - I get
Banner : * OK host2 Zimbra IMAP4rev1 service ready
Host host2 says it has NO CAPABILITY for AUTHENTICATE LOGIN
Error login : [host2] with user [user2] auth [LOGIN]: 3 NO cleartext logins disabled
3 NO cleartext logins disabled
...propagated at /usr/bin/imapsync line 676.
tried the same flags but adding -ssl2 and then still get
Error connecting to host2:993:
I must be missing something obvious but am not sure what! I was trying the command on host2 and used localhost to make sure it wasn't a firewall issue but with the same error.
If you want to use imapsync SSL, you need to enable IMAPs. Make sure that zimbraImapSSLServerEnabled is set to TRUE on the server and that zimbraImapSSLBindPort is 993.
In my case imapsync can connect and perform user to user sync but I cannot authenticate using option --authuser1 admin.
The output is:
Banner : * OK zimbra.test Zimbra IMAP4rev1 service ready
Host zimbra.test says it has NO CAPABILITY for AUTHENTICATE LOGIN
Error login : [zimbra.test] with user [testuser] auth [LOGIN]: 3 NO LOGIN failed
3 NO LOGIN failed
...propagated at /usr/bin/imapsync line 676.
I've tried --authuser1 admin@test - result the same.
According to the relevant RFC, TLS encryption must be active for AUTH=PLAIN to be available. So please try pointing your imapsync at port 993 (after making sure that SSL IMAP is enabled and running on that port) and see if that works for you.