266468RE: dealing with Yahoo slowness
- Jun 10, 2010
> > # Slow these destinations to avoid blacklisting, see/etc/postfix/transport
> > for domains configuredto.
> > 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
> > However, these values work for us, after having dealt with not getting[Michael Hutchinson]
> > 10,000 mails out per week.
> > I hope this helps.
> Interesting. Really.
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[Michael Hutchinson]
> 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.
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 ?
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