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courier: SMTP falls back to A when MX does not exist

Make the SMTP courier fall back to the A record when MX does not exist, as per
standard behaviour.

This is not implemented nicely, because Go's API does not give a clear signal
if the answer was that there are no MX records or something else happens.
For now, we implement it with a heuristic that should work pretty reliably,
but it's definitely not very nice.
This commit is contained in:
Alberto Bertogli
2016-10-01 21:55:47 +01:00
parent fdaca0bedf
commit 7fa40397c5
2 changed files with 23 additions and 17 deletions

View File

@@ -46,8 +46,7 @@ add_user srv-chasquid someone secretpassword
# Bypass MX lookup, so it can find srv-exim (via our host alias).
mkdir -p .logs
chasquid -v=2 --log_dir=.logs --config_dir=config \
--testing__outgoing_smtp_port=2025 \
--testing__bypass_mx_lookup &
--testing__outgoing_smtp_port=2025 &
wait_until_ready 1025