403 4.7.0 TLS handshake failed (Sendmail) 해결하기

https://key0.cc/ko/336678-Ssl-tls-%ED%95%B8%EB%93%9C%EC%85%B0%EC%9D%B4%ED%81%AC

 

최근들어 SSL 도입이 늘어나면서 조금씩 문제들이 발생하고 있다.

 

메일을 보냈는데 회신이 없어 확인해 보니 반송 메일이 스팸함에 들어 있었다.

 ----- Transcript of session follows -----
<
xxxxx@xxxxxxxxx.co.kr
>... Deferred: 403 4.7.0 TLS handshake failed.
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old

 

해결방법은
/etc/mail/access에 아래를 추가해 주면 된다.

Try_TLS:xxxxxxxxx.co.kr NO

 

How to fix the error ‘403 4.7.0 TLS handshake failed’ in RedHat, CentOS and OpenSuse servers with Sendmail

Along with the error message “403 4.7.0 TLS handshake failed”, it is possible to identify the recipient domain which has the TLS connectivity issue.

Edit the configuration file “/etc/mail/access” and add the line:

Try_TLS:domain.com NO

Since “/etc/mail/access” is a database, after creating that text file and editing it, use ‘makemap‘ to create the database map.

makemap hash /etc/mail/access.db < /etc/mail/access

Restart the mail server. This will exempt that domain from TLS email transmission and the mails would deliver fine without errors.

 

<참고사이트>
https://www.raramuridesign.com/kb/articles/hes-how-to-fix-email-error-403-4-7-0-tls-handshake-failed-in-cpanel-plesk-exim-qmail-exchange-and-sendmail-servers.html

How to fix email error ‘403 4.7.0 TLS handshake failed’ in cPanel, Plesk, Exim, Qmail, Exchange and SendMail servers

 

#메일 #mail #TLS #HandshakeFailed #CentOS