Not all e-mails are like that.
Some emails reply to empty mail with "Re:Subject", but I don't know the cause.
I checked the SES log to determine the cause and found that the response code was 250.
The contents of the log are as follows.
{
"notificationType": "Delivery",
"mail": {
"timestamp": "2022-04-01T01:54:58.846Z",
"source": "sender@tenping.kr",
"sourceArn": "arn:aws:ses:us-west-2:590989140517:identity/sender@tenping.kr",
"sourceIp": "52.78.120.18",
"sendingAccountId": "590989140517",
"messageId": "0101017fe2d5389e-cd35215e-1af0-4364-97e1-6cb931ee3f8d-000000",
"destination": [
"help@ad-max.co.kr"
],
"headersTruncated": false,
"headers": [
{
"name": "Received",
"value": "from WIN-IDAEGR3MKEU (ec2-52-78-120-18.ap-northeast-2.compute.amazonaws.com [52.78.120.18]) by email-smtp.amazonaws.com with SMTP (SimpleEmailService-d-NT1MBGB0G) id FrnU2dYrD6WaPMeqoEex for help@ad-max.co.kr; Fri, 01 Apr 2022 01:54:58 +0000 (UTC)"
},
{
"name": "MIME-Version",
"value": "1.0"
},
{
"name": "From",
"value": "텐핑 <sender@tenping.kr>"
},
{
"name": "To",
"value": "help@ad-max.co.kr"
},
{
"name": "Date",
"value": "1 Apr 2022 10:54:58 +0900"
},
{
"name": "Subject",
"value": "[텐핑] 소문 재시작 - K-유니콘기업 상장 전 미리 투자하는 \ufffd\ufffd\ufffd상장주식이 대세!"
},
{
"name": "Content-Type",
"value": "text/html; charset=utf-8"
},
{
"name": "Content-Transfer-Encoding",
"value": "base64"
}
],
"commonHeaders": {
"from": [
"\"텐핑\" <sender@tenping.kr>"
],
"date": "1 Apr 2022 10:54:58 +0900",
"to": [
"help@ad-max.co.kr"
],
"subject": "[텐핑] 소문 재시작 - K-유니콘기업 상장 전 미리 투자하는 \ufffd\ufffd\ufffd상장주식이 대세!"
}
},
"delivery": {
"timestamp": "2022-04-01T01:54:59.768Z",
"processingTimeMillis": 922,
"recipients": [
"help@ad-max.co.kr"
],
"smtpResponse": "250 2.0.0 OK 1648778099 r17-20020a170902be1100b00153fd4c3dcdsi813320pls.64 - gsmtp",
"remoteMtaIp": "74.125.195.26",
"reportingMTA": "a58-131.smtp-out.us-west-2.amazonses.com"
}
}