| Russell Coker 2004-07-28, 6:23 pm |
| On Sat, 24 Jul 2004 14:26, Adam Majer <adamm@galacticasoftware.com> wrote:
> Indeed. SRS breaks SPF. SPF seems to be good only for direct mailing
> domains. It essentially breaks all lists.
SPF could be used in conjunction with greylisting.
If there is a valid SPF entry then the greylist time would be short, if there
is no valid SPF entry (EG mailing list) then make a greylist time of 8 hours.
8 hours would be annoying for regular user email (some mail servers generate
warning messages after 4 hours of non-delivery). 8 hours would not be a
problem for mailing lists, you have a lot of traffic from a small number of
IP addresses, and mailing list software copes really well with destination
sites not accepting mail for a while.
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