> On 1 Nov 2016, at 14.10, Tanstaafl <tansta...@libertytrek.org> wrote: > > On 11/1/2016 3:58 AM, Sami Ketola <sami.ket...@dovecot.fi> wrote: >> On 31 Oct 2016, at 13.11, Tanstaafl <tansta...@libertytrek.org> wrote: >>> Ok, interesting. So... how does dsync do it? Or would it only work >>> between two dovecot servers? >>> >>> I'm interested in migrating from other servers (Office 365 in one case). > >> Dsync does not use IMAP protocol to store the mails to storage but instead >> uses the >> dovecot storage API to do that. Internally we can set what ever properties >> we want to >> including IMAP UIDs and POP3 UIDLs. >> >> Migrating from legacy system should then be done by pulling the mails from >> the >> legacy platform by using the imapc connector and storing them by using the >> internal apis. >> >> We can also store mails to imapc: location but in that case there is many >> properties that >> will be lost due to limitations of the IMAP protocol. > > Thanks Sami, but I don't see a definitive answer top my question in the > above... > > So, when migrating from legacy system (legacy = non-dovecot) using > imapc, is dovecot able to preserver the UIDs?
If you fetch emails over imapc and store to dovecot dsync will preserve IMAP UIDs. Sami
