On Mon, Sep 20, 2010 at 12:02 PM, Jeroen Geilman <jer...@adaptr.nl> wrote: > On 09/20/2010 08:37 PM, Yang Zhang wrote: >> >> Can postfix be configured to guarantee durable email receipt? >> >> E.g., can it be sure to fsync the mbox/Maildir file and/or directory >> > > No, but it does guarantee durability from the receiving SMTP session to the > delivering process. > This CAN be delivery to a mailbox. > >> before it acknowledges successful receipt of an email? >> > > That would be the end of the SMTP session. > No MTA guarantees final mail delivery *before* returning the SMTP status, > that would make queueing a travesty of epic proportions. > You want queueing. > Yes, really, you do .
That's fine. My main concern (worded poorly) was preventing data loss/allowing for eventual delivery, not ensuring final mbox/Maildir delivery. I just assumed there was no intermediate queuing. Since there's queuing, does Postfix also handle resuming delivery on recovery? Just to be clear, if I have this Maildir in my mailbox postmap: j...@mydomain.com joe/ and most other settings are the Ubuntu 10.04 postfix defaults, then postfix will have done an fsync by the time the "250 OK: queued as 12345" comes back, such that if I then immediately power cycle the server, when it comes back up, the mail will make its way to the final mbox/Maildir? -- Yang Zhang http://yz.mit.edu/
