diff --git a/tofu/modules/services/backend-infra/main.tf b/tofu/modules/services/backend-infra/main.tf
index d8aa7d396..5c4597f7b 100644
--- a/tofu/modules/services/backend-infra/main.tf
+++ b/tofu/modules/services/backend-infra/main.tf
@@ -237,4 +237,13 @@ resource "aws_vpc_security_group_egress_rule" "allow_tls_to_all" {
   to_port           = 443
   ip_protocol       = "tcp"
   cidr_ipv4 = "0.0.0.0/0"
+}
+
+resource "aws_vpc_security_group_egress_rule" "allow_smtp_to_all" {
+  security_group_id = aws_security_group.backend.id
+  description       = "smtp to internet"
+  from_port         = 587
+  to_port           = 587
+  ip_protocol       = "tcp"
+  cidr_ipv4 = "0.0.0.0/0"
 }
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