Received Emails don't show up in IMAP folder

[holzgeist]

Hi there,

I setup a very basic version of Stalwart on my server. All data is stored in SQLite, no filters/graylisting/etc (for now).
I can send outgoing emails and according to the logs, I can receive emails. However, they never show up in the respective accounts

2024-03-27T20:19:47.365026Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::ehlo: context="spf" event="lookup" identity="ehlo" domain="provider.of.external.domain.com" result=None
2024-03-27T20:19:47.365164Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::ehlo: context="ehlo" event="ehlo" domain="provider.of.external.domain.com"
2024-03-27T20:19:47.444379Z  INFO session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: utils::listener::listen: context="tls" event="handshake" version=TLSv1_3 cipher=TLS13_AES_256_GCM_SHA384
2024-03-27T20:19:47.533223Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::mail: context="iprev" event="lookup" result=pass ptr="provider.of.external.domain.com."
2024-03-27T20:19:47.548132Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::mail: context="spf" event="lookup" identity="mail-from" domain="provider.of.external.domain.com" sender="[email protected]" result=Pass
2024-03-27T20:19:47.548250Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::mail: context="mail-from" event="success" address="[email protected]"
2024-03-27T20:19:47.564220Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::rcpt: context="rcpt" event="success" address="[email protected]"
2024-03-27T20:19:47.643442Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::data: context="dkim" event="verify" return_path="[email protected]" from="[email protected]" result=["pass", "pass"]
2024-03-27T20:19:47.643627Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::data: context="arc" event="verify" return_path="[email protected]" from="[email protected]" result=none
2024-03-27T20:19:47.761966Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::inbound::data: context="dmarc" event="verify" return_path="[email protected]" from="[email protected]" dkim_result=none spf_result=none
2024-03-27T20:19:47.773801Z DEBUG session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::scripts::plugins::bayes: context="sieve:bayes_classify" event="skip-classify" reason="Not enough training data" spam_learns=2 ham_learns=4
2024-03-27T20:19:54.242111Z  INFO session{instance="smtp" protocol=Smtp remote.ip="X.X.X.X" remote.port=X}: smtp::queue::spool: Message queued for delivery. context="queue" event="scheduled" id=166284847722008576 from="[email protected]" nrcpts=1 size=3831
2024-03-27T20:19:54.253842Z DEBUG jmap::email::ingest: Ingested e-mail. context="email_ingest" event="success" account_id=1 document_id=16 mailbox_ids=[2] change_id=166284847742980096 blob_id=BlobHash([40, 59, 125, 249, 92, 25, 236, 19, 29, 126, 236, 182, 179, 94, 37, 163, 64, 13, 155, 124, 166, 215, 86, 171, 10, 105, 53, 47, 76, 10, 53, 172]) size=3831
2024-03-27T20:19:54.254245Z  INFO delivery{id=166284847722008576 return_path="[email protected]" nrcpt=1 size=3831}:attempt{domain="internal.domain.com" attempt_number=0}: smtp::outbound::local: context="deliver_local" event="delivered" rcpt="[email protected]"
2024-03-27T20:19:54.254981Z  INFO delivery{id=166284847722008576 return_path="[email protected]" nrcpt=1 size=3831}: smtp::outbound::delivery: Delivery completed. context="queue" event="completed"
2024-03-27T20:19:54.257534Z DEBUG jmap::services::index: Indexed document in FTS index context="fts_index_queued" event="index" account_id=1 document_id=16

Has anyone seen something like this before? I assume I'm missing some basic configuration.

As mentioned above, I did almost no customization of the configuration (diff from right after finishing configure.sh and running it):

diff --git a/common/tls.toml b/common/tls.toml
index 57cd7c1..19b6e91 100644
--- a/common/tls.toml
+++ b/common/tls.toml
@@ -9,12 +9,12 @@ timeout = "1m"
 certificate = "default"
 #acme = "letsencrypt"
 #sni = [{subject = "", certificate = ""}]
-#protocols = ["TLSv1.2", "TLSv1.3"]
-#ciphers = [ "TLS13_AES_256_GCM_SHA384", "TLS13_AES_128_GCM_SHA256",
-#            "TLS13_CHACHA20_POLY1305_SHA256", "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
-#            "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
-#            "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
-#            "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256"]
+protocols = ["TLSv1.2", "TLSv1.3"]
+ciphers = [ "TLS13_AES_256_GCM_SHA384", "TLS13_AES_128_GCM_SHA256",
+            "TLS13_CHACHA20_POLY1305_SHA256", "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
+            "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
+            "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
+            "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256"]
 ignore-client-order = true
 
 [acme."letsencrypt"]
diff --git a/common/tracing.toml b/common/tracing.toml
index 73b1c0d..64d7c5e 100644
--- a/common/tracing.toml
+++ b/common/tracing.toml
@@ -18,4 +18,4 @@ method = "log"
 path = "%{BASE_PATH}%/logs"
 prefix = "stalwart.log"
 rotate = "daily"
-level = "info"
+level = "debug"
diff --git a/smtp/resolver.toml b/smtp/resolver.toml
index af2bdb3..7e59f1f 100644
--- a/smtp/resolver.toml
+++ b/smtp/resolver.toml
@@ -3,7 +3,7 @@
 #############################################
 
 [resolver]
-type = "system"
+type = "quad9"
 #preserve-intermediates = true
 concurrency = 2
 timeout = "5s"

Any help is very much appreciated 🙏

[mdecimus]

The SPAM filter is failing to resolve the DNSBLs as they do not allow public DNS. You need to change your resolver type to system.

[holzgeist]

Got it, will try that. I think I remember I had some issues with outbound mails when using the system resolver. But then I at least know where to look next 😃