Migrate to latest go-smtp version

Fixes #661 among other minor things.

framework/config/map.go

@@ -284,7 +284,7 @@ func ParseDataSize(s string) (int, error) {
 // data unit and allows multiple arguments (they will be added together).
 //
 // See Map.Custom for description of arguments.
-func (m *Map) DataSize(name string, inheritGlobal, required bool, defaultVal int, store *int) {
+func (m *Map) DataSize(name string, inheritGlobal, required bool, defaultVal int64, store *int64) {
 	m.Custom(name, inheritGlobal, required, func() (interface{}, error) {
 		return defaultVal, nil
 	}, func(_ *Map, node Node) (interface{}, error) {
@@ -301,7 +301,7 @@ func (m *Map) DataSize(name string, inheritGlobal, required bool, defaultVal int
 			return nil, NodeErr(node, "%v", err)
 		}
 
-		return dur, nil
+		return int64(dur), nil
 	}, store)
 }
 

framework/module/delivery_target.go

@@ -22,6 +22,7 @@ import (
 	"context"
 
 	"github.com/emersion/go-message/textproto"
+	"github.com/emersion/go-smtp"
 	"github.com/foxcpp/maddy/framework/buffer"
 )
 
@@ -56,7 +57,7 @@ type Delivery interface {
 	// recipients that can't be used.  Note: MsgMetadata object passed to Start
 	// contains BodyLength field. If it is non-zero, it can be used to check
 	// storage quota for the user before Body.
-	AddRcpt(ctx context.Context, rcptTo string) error
+	AddRcpt(ctx context.Context, rcptTo string, opts smtp.RcptOptions) error
 
 	// Body sets the body and header contents for the message.
 	// If this method fails, message is assumed to be undeliverable

framework/module/dummy.go

@@ -22,6 +22,7 @@ import (
 	"context"
 
 	"github.com/emersion/go-message/textproto"
+	"github.com/emersion/go-smtp"
 	"github.com/foxcpp/maddy/framework/buffer"
 	"github.com/foxcpp/maddy/framework/config"
 )
@@ -63,7 +64,7 @@ func (d *Dummy) Start(ctx context.Context, msgMeta *MsgMetadata, mailFrom string
 
 type dummyDelivery struct{}
 
-func (dd dummyDelivery) AddRcpt(ctx context.Context, to string) error {
+func (dd dummyDelivery) AddRcpt(ctx context.Context, rcptTo string, opts smtp.RcptOptions) error {
 	return nil
 }
 

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/emersion/go-milter v0.3.3
 	github.com/emersion/go-msgauth v0.6.6
 	github.com/emersion/go-sasl v0.0.0-20220912192320-0145f2c60ead
-	github.com/emersion/go-smtp v0.16.0
+	github.com/emersion/go-smtp v0.20.2-0.20240121112028-434ddca4792e
 	github.com/foxcpp/go-dovecot-sasl v0.0.0-20200522223722-c4699d7a24bf
 	github.com/foxcpp/go-imap-backend-tests v0.0.0-20220105184719-e80aa29a5e16
 	github.com/foxcpp/go-imap-i18nlevel v0.0.0-20200208001533-d6ec88553005
@@ -52,6 +52,7 @@ require (
 	golang.org/x/net v0.17.0
 	golang.org/x/sync v0.2.0
 	golang.org/x/text v0.14.0
+	modernc.org/sqlite v1.28.0
 )
 
 require (
@@ -153,7 +154,6 @@ require (
 	modernc.org/mathutil v1.6.0 // indirect
 	modernc.org/memory v1.7.2 // indirect
 	modernc.org/opt v0.1.3 // indirect
-	modernc.org/sqlite v1.28.0 // indirect
 	modernc.org/strutil v1.1.3 // indirect
 	modernc.org/token v1.0.1 // indirect
 )

go.sum

@@ -234,10 +234,8 @@ github.com/aws/aws-sdk-go-v2/service/sts v1.19.0/go.mod h1:BgQOMsg8av8jset59jely
 github.com/aws/smithy-go v1.13.5 h1:hgz0X/DX0dGqTYpGALqXJoRKRj5oQ7150i5FdTePzO8=
 github.com/aws/smithy-go v1.13.5/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
-github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/caddyserver/certmagic v0.17.2 h1:o30seC1T/dBqBCNNGNHWwj2i5/I/FMjBbTAhjADP3nE=
 github.com/caddyserver/certmagic v0.17.2/go.mod h1:ouWUuC490GOLJzkyN35eXfV8bSbwMwSf4bdhkIxtdQE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -258,8 +256,6 @@ github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWH
 github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211001041855-01bcc9b48dfe/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -290,8 +286,8 @@ github.com/emersion/go-sasl v0.0.0-20191210011802-430746ea8b9b/go.mod h1:G/dpzLu
 github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
 github.com/emersion/go-sasl v0.0.0-20220912192320-0145f2c60ead h1:fI1Jck0vUrXT8bnphprS1EoVRe2Q5CKCX8iDlpqjQ/Y=
 github.com/emersion/go-sasl v0.0.0-20220912192320-0145f2c60ead/go.mod h1:iL2twTeMvZnrg54ZoPDNfJaJaqy0xIQFuBdrLsmspwQ=
-github.com/emersion/go-smtp v0.16.0 h1:eB9CY9527WdEZSs5sWisTmilDX7gG+Q/2IdRcmubpa8=
-github.com/emersion/go-smtp v0.16.0/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
+github.com/emersion/go-smtp v0.20.2-0.20240121112028-434ddca4792e h1:WAPhaiA+bDO/mFgCDQJKCQI/RbH/73lCcis4Jb8Y2ec=
+github.com/emersion/go-smtp v0.20.2-0.20240121112028-434ddca4792e/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
 github.com/emersion/go-textwrapper v0.0.0-20160606182133-d0e65e56babe/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U=
 github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594 h1:IbFBtwoTQyw0fIM5xv1HF+Y+3ZijDR839WMulgxCcUY=
 github.com/emersion/go-textwrapper v0.0.0-20200911093747-65d896831594/go.mod h1:aqO8z8wPrjkscevZJFVE1wXJrLpC5LtJG7fqLOsPb2U=
@@ -321,8 +317,6 @@ github.com/foxcpp/go-imap-mess v0.0.0-20230108134257-b7ec3a649613 h1:fw9OWfPxP1C
 github.com/foxcpp/go-imap-mess v0.0.0-20230108134257-b7ec3a649613/go.mod h1:P/O/qz4gaVkefzJ40BUtN/ZzBnaEg0YYe1no/SMp7Aw=
 github.com/foxcpp/go-imap-namespace v0.0.0-20200802091432-08496dd8e0ed h1:1Jo7geyvunrPSjL6F6D9EcXoNApS5v3LQaro7aUNPnE=
 github.com/foxcpp/go-imap-namespace v0.0.0-20200802091432-08496dd8e0ed/go.mod h1:Shows1vmkBWO40ChOClaUe6DUnZrsP1UPAuoWzIUdgQ=
-github.com/foxcpp/go-imap-sql v0.5.1-0.20230313080458-c0176dad679c h1:vqLBcLtG5lcXL2hifcsKjiUaljRukD8xHodVM2rZ+L4=
-github.com/foxcpp/go-imap-sql v0.5.1-0.20230313080458-c0176dad679c/go.mod h1:8uUTN2RRWZrETuA9pDvDr4SjV1hCvEYG2WOlXuupj+g=
 github.com/foxcpp/go-imap-sql v0.5.1-0.20240120174134-48f9dc0b4abf h1:tqkJhHCPp1LL0tFqe0GwPjw2BMug8ivMtKJbQ7ZUA/g=
 github.com/foxcpp/go-imap-sql v0.5.1-0.20240120174134-48f9dc0b4abf/go.mod h1:8uUTN2RRWZrETuA9pDvDr4SjV1hCvEYG2WOlXuupj+g=
 github.com/foxcpp/go-mockdns v0.0.0-20191216195825-5eabd8dbfe1f/go.mod h1:tPg4cp4nseejPd+UKxtCVQ2hUxNTZ7qQZJa7CLriIeo=
@@ -342,11 +336,9 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-ldap/ldap/v3 v3.4.4 h1:qPjipEpt+qDa6SI/h1fzuGWoRUY+qqQ9sOZq67/PYUs=
 github.com/go-ldap/ldap/v3 v3.4.4/go.mod h1:fe1MsuN5eJJ1FeLT/LEBVdWfNWKh459R7aXgXtJC+aI=
-github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
 github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
 github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
-github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -426,6 +418,7 @@ github.com/google/pprof v0.0.0-20210226084205-cbba55b83ad5/go.mod h1:kpwsk12EmLe
 github.com/google/pprof v0.0.0-20210601050228-01bbb1931b22/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/pprof v0.0.0-20210609004039-a478d1d731e9/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
+github.com/google/pprof v0.0.0-20221118152302-e6195bd50e26 h1:Xim43kblpZXfIBQsbuBVKCudVG457BR2GZFIz3uw3hQ=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
 github.com/google/s2a-go v0.1.4 h1:1kZ/sQM3srePvKs3tXAvQzo66XfcReoqFpIpIccE7Oc=
 github.com/google/s2a-go v0.1.4/go.mod h1:Ej+mSEMGRnqRzjc7VtF+jdBwYG5fuJfiZ8ELkjEwM0A=
@@ -473,12 +466,10 @@ github.com/johannesboyne/gofakes3 v0.0.0-20210704111953-6a9f95c2941c h1:lx/uPI+m
 github.com/johannesboyne/gofakes3 v0.0.0-20210704111953-6a9f95c2941c/go.mod h1:LIAXxPvcUXwOcTIj9LSNSUpE9/eMHalTWxsP/kmWxQI=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
-github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
-github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 h1:Z9n2FFNUXsshfwJMBgNA0RU6/i7WVaAegv3PtuIHPMs=
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
@@ -557,20 +548,17 @@ github.com/minio/minio-go/v7 v7.0.55 h1:ZXqUO/8cgfHzI+08h/zGuTTFpISSA32BZmBE3FCL
 github.com/minio/minio-go/v7 v7.0.55/go.mod h1:NUDy4A4oXPq1l2yK6LTSvCEzAMeIcoz9lcj5dbzSrRE=
 github.com/minio/sha256-simd v1.0.1 h1:6kaan5IFmwTNynnKKpDHe6FWHohJOHhCPchzK49dzMM=
 github.com/minio/sha256-simd v1.0.1/go.mod h1:Pz6AKMiUdngCLpeTL/RJY1M9rUuPMYujV5xJjtbRSN8=
-github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eIhFbs2+BFgRtFPeD/KE+zxI=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
-github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/netauth/netauth v0.6.2-0.20220831214440-1df568cd25d6 h1:TsF5Cl0Mj5JMvPOP2ySVq+CZoiPrTGwvNPbuQotuSAE=
 github.com/netauth/netauth v0.6.2-0.20220831214440-1df568cd25d6/go.mod h1:4PEbISVqRCQaXaDAt289w3nK9UhoF8/ZOLy31Hbv7ds=
 github.com/netauth/protocol v0.0.0-20210918062754-7fee492ffcbd h1:4yVpQ/+li28lQ/daYCWeDB08obRmjaoAw2qfFFaCQ40=
 github.com/netauth/protocol v0.0.0-20210918062754-7fee492ffcbd/go.mod h1:wpK5wqysOJU1w2OxgG65du8M7UqBkxzsNaJdjwiRqAs=
-github.com/pelletier/go-toml v1.9.3/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
 github.com/pelletier/go-toml/v2 v2.0.8 h1:0ctb6s9mE31h0/lhu+J6OPmVeDxJn+kYnJc2jZR9tGQ=
 github.com/pelletier/go-toml/v2 v2.0.8/go.mod h1:vuYfssBdrU2XDZ9bYydBu6t+6a6PYNcZljzZR9VXg+4=
 github.com/pierrec/lz4 v2.5.2+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
@@ -604,7 +592,6 @@ github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46 h1:GHRpF1pTW19a
 github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46/go.mod h1:uAQ5PCi+MFsC7HjREoAz1BU+Mq60+05gifQSsHSDG/8=
 github.com/shabbyrobe/gocovmerge v0.0.0-20180507124511-f6ea450bfb63 h1:J6qvD6rbmOil46orKqJaRPG+zTpoGlBTUdyv8ki63L0=
 github.com/shabbyrobe/gocovmerge v0.0.0-20180507124511-f6ea450bfb63/go.mod h1:n+VKSARF5y/tS9XFSP7vWDfS+GUC5vs/YT7M5XDTUEM=
-github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.9.2 h1:oxx1eChJGI6Uks2ZC4W1zpLlVgqB8ner4EuQwV4Ik1Y=
 github.com/sirupsen/logrus v1.9.2/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
@@ -663,7 +650,6 @@ go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqe
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
 go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
 go.uber.org/goleak v1.1.11 h1:wy28qYRKZgnJTxGxvye5/wgWr1EKjmUDGYox5mGlRlI=
-go.uber.org/goleak v1.1.11/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.24.0 h1:FiJd5l1UOLj0wCgbSE0rwwXHzEdAZS6hiiSnxJN/D60=
@@ -1211,7 +1197,6 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -1230,6 +1215,8 @@ modernc.org/cc/v3 v3.40.0 h1:P3g79IUS/93SYhtoeaHW+kRCIrYaxJ27MFPv+7kaTOw=
 modernc.org/cc/v3 v3.40.0/go.mod h1:/bTg4dnWkSXowUO6ssQKnOV0yMVxDYNIsIrzqTFDGH0=
 modernc.org/ccgo/v3 v3.16.13 h1:Mkgdzl46i5F/CNR/Kj80Ri59hC8TKAhZrYSaqvkwzUw=
 modernc.org/ccgo/v3 v3.16.13/go.mod h1:2Quk+5YgpImhPjv2Qsob1DnZ/4som1lJTodubIcoUkY=
+modernc.org/ccorpus v1.11.6 h1:J16RXiiqiCgua6+ZvQot4yUuUy8zxgqbqEEUuGPlISk=
+modernc.org/httpfs v1.0.6 h1:AAgIpFZRXuYnkjftxTAZwMIiwEqAfk8aVB2/oA6nAeM=
 modernc.org/libc v1.29.0 h1:tTFRFq69YKCF2QyGNuRUQxKBm1uZZLubf6Cjh/pVHXs=
 modernc.org/libc v1.29.0/go.mod h1:DaG/4Q3LRRdqpiLyP0C2m1B8ZMGkQ+cCgOIjEtQlYhQ=
 modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
@@ -1242,8 +1229,10 @@ modernc.org/sqlite v1.28.0 h1:Zx+LyDDmXczNnEQdvPuEfcFVA2ZPyaD7UCZDjef3BHQ=
 modernc.org/sqlite v1.28.0/go.mod h1:Qxpazz0zH8Z1xCFyi5GSL3FzbtZ3fvbjmywNogldEW0=
 modernc.org/strutil v1.1.3 h1:fNMm+oJklMGYfU9Ylcywl0CO5O6nTfaowNsh2wpPjzY=
 modernc.org/strutil v1.1.3/go.mod h1:MEHNA7PdEnEwLvspRMtWTNnp2nnyvMfkimT1NKNAGbw=
+modernc.org/tcl v1.15.2 h1:C4ybAYCGJw968e+Me18oW55kD/FexcHbqH2xak1ROSY=
 modernc.org/token v1.0.1 h1:A3qvTqOwexpfZZeyI0FeGPDlSWX5pjZu9hF4lU+EKWg=
 modernc.org/token v1.0.1/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
+modernc.org/z v1.7.3 h1:zDJf6iHjrnB+WRD88stbXokugjyc0/pB91ri1gO6LZY=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

internal/endpoint/smtp/session.go

@@ -335,7 +335,7 @@ func (s *Session) fetchRDNSName(ctx context.Context) {
 	s.connState.RDNSName.Set(name, nil)
 }
 
-func (s *Session) Rcpt(to string) error {
+func (s *Session) Rcpt(to string, opts *smtp.RcptOptions) error {
 	s.msgLock.Lock()
 	defer s.msgLock.Unlock()
 
@@ -363,7 +363,7 @@ func (s *Session) Rcpt(to string) error {
 	rcptCtx, rcptTask := trace.NewTask(s.msgCtx, "RCPT TO")
 	defer rcptTask.End()
 
-	if err := s.rcpt(rcptCtx, to); err != nil {
+	if err := s.rcpt(rcptCtx, to, opts); err != nil {
 		if s.loggedRcptErrors < s.endp.maxLoggedRcptErrors {
 			s.log.Error("RCPT error", err, "rcpt", to, "msg_id", s.msgMeta.ID)
 			s.loggedRcptErrors++
@@ -377,7 +377,7 @@ func (s *Session) Rcpt(to string) error {
 	return nil
 }
 
-func (s *Session) rcpt(ctx context.Context, to string) error {
+func (s *Session) rcpt(ctx context.Context, to string, opts *smtp.RcptOptions) error {
 	// INTERNATIONALIZATION: Do not permit non-ASCII addresses unless SMTPUTF8 is
 	// used.
 	if !address.IsASCII(to) && !s.opts.UTF8 {
@@ -396,7 +396,7 @@ func (s *Session) rcpt(ctx context.Context, to string) error {
 		}
 	}
 
-	return s.delivery.AddRcpt(ctx, cleanTo)
+	return s.delivery.AddRcpt(ctx, cleanTo, *opts)
 }
 
 func (s *Session) Logout() error {
@@ -413,6 +413,9 @@ func (s *Session) Logout() error {
 	if s.cancelRDNS != nil {
 		s.cancelRDNS()
 	}
+
+	s.endp.sessionCnt.Add(-1)
+
 	return nil
 }
 

internal/endpoint/smtp/smtp.go

@@ -30,6 +30,7 @@ import (
 	"path/filepath"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/emersion/go-sasl"
@@ -67,7 +68,9 @@ type Endpoint struct {
 	deferServerReject   bool
 	maxLoggedRcptErrors int
 	maxReceived         int
-	maxHeaderBytes      int
+	maxHeaderBytes      int64
+
+	sessionCnt atomic.Int32
 
 	authNormalize authz.NormalizeFunc
 	authMap       module.Table
@@ -401,6 +404,8 @@ func (endp *Endpoint) NewSession(conn *smtp.Conn) (smtp.Session, error) {
 		return nil, endp.wrapErr("", true, "EHLO", err)
 	}
 
+	endp.sessionCnt.Add(1)
+
 	return sess, nil
 }
 
@@ -447,6 +452,10 @@ func (endp *Endpoint) newSession(conn *smtp.Conn) *Session {
 	return s
 }
 
+func (endp *Endpoint) ConnectionCount() int {
+	return int(endp.sessionCnt.Load())
+}
+
 func (endp *Endpoint) Close() error {
 	endp.serv.Close()
 	endp.listenersWg.Wait()