> > # Slow these destinations to avoid blacklisting, see /etc/postfix/transport > > for domains configured > > hotmail_destination_concurrency_limit = 2 > > hotmail_destination_rate_delay = 2s > > hotmail_destination_recipient_limit = 5 > > yahoo_destination_concurrency_limit = 4 > > yahoo_destination_rate_delay = 1s > > yahoo_destination_recipient_limit = 5 > > > > These settings can be tweaked depending on what server you're talking to. > > However, these values work for us, after having dealt with not getting > > 10,000 mails out per week. > > > > I hope this helps. > > Interesting. Really.
[Michael Hutchinson] It is. I don't know of any other software that even comes close to supporting rate limiting for outgoing E-Mail. As I understand it, even companies that package Postfix in their NetApps are taking advantage of these features now. > FYI This should be documented better: Postfix's _rate_delay feature > forces a per-destination delivery concurrency of 1, so you could > drop the _destination_concurrency_limit settings. The Postfix > implementation is utterly simple: schedule one delivery, then > suspend delivery for N second, then schedule the next delivery. [Michael Hutchinson] I had thought, whilst I was writing the E-Mail, that this could deserve a howto or manual section, perhaps briefly describing a general situation that would reflect the real world problem of delivery of E-Mail to servers like Yahoo/Google, and how postfix can be configured to react in a more Yahoo/Google restricted manner. What assistance can I provide ? Cheers, Michael Hutchinson [email protected]
