SSL_connect error to email-smtp-fips.us-east-1.amazonaws.com

0

Hello,

I am trying to send an e-mail with postfix by relaying over email-smtp-fips.us-east-1.amazonaws.com:25. I followed the related documents and managed to do it with a regular endpoint (email-smtp.us-east-1.amazonaws.com:25). However, when I tried to do it with the fips endpoint I got the following warning and errors (syslog):

postfix/smtp: SSL_connect error to email-smtp-fips.us-east-1.amazonaws.com[IP ADDRESS REMOVED]:25: -1
postfix/smtp: warning: TLS library problem: error:140943FC:SSL routines:ssl3_read_bytes:sslv3 alert bad record mac:../ssl/record/rec_layer_s3.c:1528:SSL alert number 20:
postfix/smtp: 972631FF6D: Cannot start TLS: handshake failure
postfix/smtp: SSL_connect error to email-smtp-fips.us-east-1.amazonaws.com[IP ADDRESS REMOVED]:25: -1
postfix/smtp: warning: TLS library problem: error:140943FC:SSL routines:ssl3_read_bytes:sslv3 alert bad record mac:../ssl/record/rec_layer_s3.c:1528:SSL alert number 20:
postfix/smtp: 972631FF6D: Cannot start TLS: handshake failure
postfix/smtp: SSL_connect error to email-smtp-fips.us-east-1.amazonaws.com[IP ADDRESS REMOVED]:25: -1
postfix/smtp: warning: TLS library problem: error:140943FC:SSL routines:ssl3_read_bytes:sslv3 alert bad record mac:../ssl/record/rec_layer_s3.c:1528:SSL alert number 20:
postfix/smtp: 972631FF6D: to=<EMAIL ADDRESS REMOVED>, relay=email-smtp-fips.us-east-1.amazonaws.com[IP ADDRESS REMOVED]:25, delay=23, delays=23/0.05/0.1/0, dsn=4.7.5, status=deferred (Cannot start TLS: handshake failure)

I also tried port 587 without any luck. I couldn't find what is wrong and I need help.

Edited by: alperdom on Jan 8, 2021 12:01 AM

gefragt vor 4 Jahren768 Aufrufe
1 Antwort
0

For anyone that might come across this problem, here is the solution: you should be using a postfix version that supports disabling TLSv1.3 as FIPS endpoints only accept connections with cipher TLSv1.2

beantwortet vor 4 Jahren

Du bist nicht angemeldet. Anmelden um eine Antwort zu veröffentlichen.

Eine gute Antwort beantwortet die Frage klar, gibt konstruktives Feedback und fördert die berufliche Weiterentwicklung des Fragenstellers.

Richtlinien für die Beantwortung von Fragen