Merge pull request #504 from Hestia-Homes/ses

set up of AWS SES

infrastructure/terraform/main.tf

@@ -261,4 +261,17 @@ module "cloudfront_distribution" {
   bucket_arn         = module.s3.bucket_arn
   bucket_domain_name = module.s3.bucket_domain_name
   stage              = var.stage
+}
+
+################################################
+# SES - Email sending
+################################################
+module "ses" {
+  source      = "./modules/ses"
+  domain_name = "domna.homes"
+  stage       = var.stage
+}
+
+output "ses_dns_records" {
+  value = module.ses.dns_records
 }

infrastructure/terraform/modules/ses/main.tf

@@ -0,0 +1,50 @@
+resource "aws_ses_domain_identity" "this" {
+  domain = var.domain_name
+}
+
+# DKIM signing
+resource "aws_ses_domain_dkim" "this" {
+  domain = aws_ses_domain_identity.this.domain
+}
+
+# IAM user for SES SMTP
+resource "aws_iam_user" "ses_user" {
+  name = "${var.stage}-ses-user"
+}
+
+resource "aws_iam_user_policy" "ses_send_policy" {
+  name = "AllowSESSendEmail"
+  user = aws_iam_user.ses_user.name
+
+  policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [
+      {
+        Effect   = "Allow"
+        Action   = [
+          "ses:SendEmail",
+          "ses:SendRawEmail"
+        ]
+        Resource = "*"
+      }
+    ]
+  })
+}
+
+resource "aws_iam_access_key" "ses_user" {
+  user = aws_iam_user.ses_user.name
+}
+
+# Store SMTP credentials in AWS Secrets Manager
+resource "aws_secretsmanager_secret" "ses_smtp" {
+  name        = "${var.stage}/ses/smtp_credentials"
+  description = "SMTP credentials for SES (${var.stage})"
+}
+
+resource "aws_secretsmanager_secret_version" "ses_smtp" {
+  secret_id     = aws_secretsmanager_secret.ses_smtp.id
+  secret_string = jsonencode({
+    username = aws_iam_access_key.ses_user.id
+    password = aws_iam_access_key.ses_user.ses_smtp_password_v4
+  })
+}

infrastructure/terraform/modules/ses/outputs.tf

@@ -0,0 +1,66 @@
+# These are our DNS records that will need to be added to our Krystal account
+
+# TXT record
+output "verification_record" {
+  description = "TXT record required to verify the domain with SES"
+  value = {
+    name  = "_amazonses.${aws_ses_domain_identity.this.domain}"
+    type  = "TXT"
+    value = aws_ses_domain_identity.this.verification_token
+  }
+}
+
+# DKIM CNAME records
+output "dkim_records" {
+  description = "CNAME records required to enable DKIM for SES"
+  value = [
+    for dkim in aws_ses_domain_dkim.this.dkim_tokens : {
+      name  = "${dkim}._domainkey.${aws_ses_domain_identity.this.domain}"
+      type  = "CNAME"
+      value = "${dkim}.dkim.amazonses.com"
+    }
+  ]
+}
+
+# SMTP credentials - send them to secrets manager
+output "ses_smtp_secret_arn" {
+  description = "ARN of the SES SMTP credentials stored in Secrets Manager"
+  value       = aws_secretsmanager_secret.ses_smtp.arn
+}
+
+output "smtp_password" {
+  value       = aws_iam_access_key.ses_user.ses_smtp_password_v4
+  sensitive   = true
+  description = "SMTP password for SES"
+}
+
+output "dns_records" {
+  description = "All DNS records required for SES verification and recommended deliverability"
+  value = concat(
+    [
+      {
+        name  = "_amazonses.${aws_ses_domain_identity.this.domain}"
+        type  = "TXT"
+        value = aws_ses_domain_identity.this.verification_token
+      },
+      {
+        name  = var.domain_name
+        type  = "TXT"
+        value = "v=spf1 include:amazonses.com -all"
+      },
+      {
+        name  = "_dmarc.${var.domain_name}"
+        type  = "TXT"
+        value = "v=DMARC1; p=quarantine; rua=mailto:postmaster@${var.domain_name}"
+      }
+    ],
+    [
+      for dkim in aws_ses_domain_dkim.this.dkim_tokens : {
+        name  = "${dkim}._domainkey.${aws_ses_domain_identity.this.domain}"
+        type  = "CNAME"
+        value = "${dkim}.dkim.amazonses.com"
+      }
+    ]
+  )
+}
+

infrastructure/terraform/modules/ses/variables.tf

@@ -0,0 +1,9 @@
+variable "domain_name" {
+  description = "The domain to verify with SES (e.g. domna.homes)"
+  type        = string
+}
+
+variable "stage" {
+  description = "Deployment stage (e.g. dev, prod)"
+  type        = string
+}