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Allow multiple localpart catch all separators, e.g. both "+" and "-", for addresses you+anything@example.com and you-anything@example.com

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The original config option stays, and we still use it for the common case where
we have a single separator. The "+" is configured by default. It is optional,
just like the new option "LocalpartCatchallSeparators" (plural).

When parsing the config file, we combine LocalpartCatchallSeparator and
LocalpartCatchallSeparators into a single list
LocalpartCatchallSeparatorsEffective, which we use throughout the code.

For issue #301 by janc13
This commit is contained in:
Mechiel Lukkien
2025-03-07 14:39:58 +01:00
parent d0b241499f
commit 9a8bb1134b
26 changed files with 255 additions and 95 deletions
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10
smtpserver/server_test.go
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@ -1494,12 +1494,13 @@ func TestCatchall(t *testing.T) {
testDeliver("mjl@mox.example", nil) // Exact match.
testDeliver("mjl+test@mox.example", nil) // Domain localpart catchall separator.
testDeliver("MJL+TEST@mox.example", nil) // Again, and case insensitive.
testDeliver("unknown@mox.example", nil) // Catchall address, to account catchall.
n, err := bstore.QueryDB[store.Message](ctxbg, ts.acc.DB).Count()
tcheck(t, err, "checking delivered messages")
tcompare(t, n, 3)
testDeliver("unknown@mox.example", nil) // Catchall address, to account catchall.
acc, err := store.OpenAccount(pkglog, "catchall", false)
tcheck(t, err, "open account")
defer func() {
@ -1509,6 +1510,13 @@ func TestCatchall(t *testing.T) {
n, err = bstore.QueryDB[store.Message](ctxbg, acc.DB).Count()
tcheck(t, err, "checking delivered messages to catchall account")
tcompare(t, n, 1)
testDeliver("mjl-test@mox2.example", nil) // Second catchall separator.
testDeliver("mjl-test+test@mox2.example", nil) // Silly, both separators in address.
testDeliver("mjl+test-test@mox2.example", nil)
n, err = bstore.QueryDB[store.Message](ctxbg, ts.acc.DB).Count()
tcheck(t, err, "checking delivered messages")
tcompare(t, n, 6)
}
// Test DKIM signing for outgoing messages.