diff --git a/go.mod b/go.mod
index b0ba976..56c7512 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/ses v1.19.5
 	github.com/creasty/defaults v1.7.0
 	github.com/emersion/go-sasl v0.0.0-20220912192320-0145f2c60ead
-	github.com/emersion/go-smtp v0.19.0
+	github.com/emersion/go-smtp v0.20.0
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/jessevdk/go-flags v1.5.0
 	github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible
diff --git a/go.sum b/go.sum
index ae5aeb4..baf37ca 100644
--- a/go.sum
+++ b/go.sum
@@ -60,8 +60,8 @@ github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDD
 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 v0.19.0 h1:iVCDtR2/JY3RpKoaZ7u6I/sb52S3EzfNHO1fAWVHgng=
-github.com/emersion/go-smtp v0.19.0/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
+github.com/emersion/go-smtp v0.20.0 h1:eTD2iPzYKRrFF+NDHPwKgsBt5ZmB2jO6P2rP2LlVYWI=
+github.com/emersion/go-smtp v0.20.0/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
 github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY=
 github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=