Not able to receive email from Gmail, other emails received ok

aaP_h1

Hello,
After the setup the mail server:
Email Sending: Ok, able to send without problem, including send to Gmail.
Email Receiving: Able to receive any other emails except the Gmail.

There was a Email response at Gmail indicated:
The response was:
TLS Negotiation failed: FAILED_PRECONDITION: starttls error (71): 126368525094848:error:10000410:SSL routines😮PENSSL_internal:SSLV3_ALERT_HANDSHAKE_FAILURE:third_party/openssl/boringssl/src/ssl/tls_record.cc:583:SSL alert number 40 ;126368525094848:error:1000009a:SSL routines😮PENSSL_internal:HANDSHAKE_FAILURE_ON_CLIENT_HELLO:third_party/openssl/boringssl/src/ssl/handshake.cc:657:

Domain is managed by Cloudflare.
Please advise where is the issue,
Thanks.

aaPanel_Kern

check the postfix configuration, which can be viewed in the server status
"mail.135mailtest.com" is replaced with your domain name
Put:
smtpd_tls_chain_files=/etc/ssl/private/ssl-cert-snakeoil.key,/etc/ssl/certs/ssl-cert-snakeoil.pem
Change to:
smtpd_tls_chain_files = /www/server/panel/plugin/mail_sys/cert/135mailtest.com/privkey.pem,/www/server/panel/plugin/mail_sys/cert/135mailtest.com/fullchain.pem
Note to replace 135mailtest.com with your domain name.
Also check /www/server/panel/plugin/mail_sys/cert/135mailtest.com/ for privkey.pem and fullchain.pem files

You can use this command to check whether the correct SSL is configured
openssl s_client -connect mail.135mailtest.com:587 -starttls smtp
or
openssl s_client -connect mail.135mailtest.com:465

If the display is not OK, try to save the SSL certificate again, or please re-apply for SSL

aaP_h1

Just searched the forum from one reply it mentioned execute this code "sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/ssl-cert-snakeoil.key -out /etc/ssl/certs/ssl-cert-snakeoil.pem"

And i just did, then i am able to receive email from gmail now.
Anyone please explain what is this code for and why this happened?

Thank you

aaP_h1

aaPanel_Kern

I am keep getting this, not sure why:
4027586A117C0000:error:80000071:system library:BIO_connect:No route to host:../crypto/bio/bio_sock2.c:114:calling connect() 4027586A117C0000:error:10000067:BIO routines:BIO_connect:connect error:../crypto/bio/bio_sock2.c:116: 4027586A117C0000:error:80000071:system library:BIO_connect:No route to host:../crypto/bio/bio_sock2.c:114:calling connect() 4027586A117C0000:error:10000067:BIO routines:BIO_connect:connect error:../crypto/bio/bio_sock2.c:116: 4027586A117C0000:error:8000006E:system library:BIO_connect:Connection timed out:../crypto/bio/bio_sock2.c:114:calling connect() 4027586A117C0000:error:10000067:BIO routines:BIO_connect:connect error:../crypto/bio/bio_sock2.c:116: 4027586A117C0000:error:8000006E:system library:BIO_connect:Connection timed out:../crypto/bio/bio_sock2.c:114:calling connect() 4027586A117C0000:error:10000067:BIO routines:BIO_connect:connect error:../crypto/bio/bio_sock2.c:116: connect:errno=110

aaP_h1

got another error message said "ModuleNotFoundError: No module named 'plugin_tool'"

aaPanel_Kern

Hi, can you give us your aapanel information? The server makes a snapshot backup first, if possible, please send it to kern@aapanel.com.
It is recommended to fill in the following
Post link:
SSH IP address, account password and port:
aapanel login link address and account password:
Detailed problem description:

No post link will not be able to know which user's information is, and the problem will not be processed

aaP_h1