diff --git a/smtp/mta.go b/smtp/mta.go
index 6a592e3..0ad6fac 100644
--- a/smtp/mta.go
+++ b/smtp/mta.go
@@ -28,7 +28,7 @@ type mta struct {
 }
 
 // SMTPAddrs priority list
-var SMTPAddrs = []string{":465", ":587", ":25"}
+var SMTPAddrs = []string{":25", ":587", ":465"}
 
 func NewMTA(loglevel string) utils.MTA {
 	return &mta{