diff --git a/android/build.gradle b/android/build.gradle
index c33dcee..7d1edec 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -56,14 +56,6 @@ android {
     packagingOptions {
         exclude 'androidsupportmultidexversion.txt'
     }
-
-    buildTypes {
-        release {
-            minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
-
 }
 
 dependencies {
diff --git a/android/proguard-rules.txt b/android/proguard-rules.txt
index 1564ced..e9d6827 100644
--- a/android/proguard-rules.txt
+++ b/android/proguard-rules.txt
@@ -12,4 +12,10 @@
 -keep class com.fasterxml.jackson.** {*;}
 # Logback
 -keep class ch.qos.** { *; }
+
+# Mail classes (Logback SMTP appender)
+-dontwarn javax.mail.**
+-dontwarn javax.mail.internet.**
+-dontwarn javax.activation.**
+
 ##---------------End: proguard configuration ----------