diff --git a/RNMail/RNMail.m b/RNMail/RNMail.m
index 2e95e44..e73737b 100644
--- a/RNMail/RNMail.m
+++ b/RNMail/RNMail.m
@@ -110,6 +110,16 @@ + (BOOL)requiresMainQueueSetup
                 mimeType = @"application/zip";
             } else if ([attachmentType isEqualToString:@"text"]) {
                 mimeType = @"text/*";
+            } else if ([attachmentType isEqualToString:@"mp3"]) {
+                mimeType = @"audio/mpeg";
+            } else if ([attachmentType isEqualToString:@"wav"]) {
+                mimeType = @"audio/wav";
+            } else if ([attachmentType isEqualToString:@"aiff"]) {
+                mimeType = @"audio/aiff";
+            } else if ([attachmentType isEqualToString:@"flac"]) {
+                mimeType = @"audio/flac";
+            } else if ([attachmentType isEqualToString:@"ogg"]) {
+                mimeType = @"audio/ogg";
             }
 
             // Add attachment