kumomta

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Wez Furlong 9ba637ab38 dns-resolver: add negative caching for MX lookup failures

This is why slow DNS often expanded to 3-4x as long as the expected
timeout value; we make a handful of calls in succession, assuming
that the cache was effective in an earlier stage.

We now cache errors for 5 minutes by default, and it can be configured
as desired.

refs: https://github.com/KumoCorp/kumomta/issues/325

2025-02-27 15:55:37 -07:00

_index.md

add kumo.dns.lookup_mx

2023-03-15 09:34:23 -07:00

configure_resolver.md

docs: fixup link to hickory resolver options

2024-09-18 16:37:43 -07:00

configure_unbound_resolver.md

docs: fix typo on configure_unbound_resolver page

2025-01-08 15:55:04 -07:00

lookup_addr.md

docs: update for 2023.08.22-4d895015 release