SSL connect error: error:1408F10B:SSL routines:ssl3_get_record:wrong version number

[GR06LBS]

Dear Ladies and Gentlemen, I hereby request your help regarding my above error code
in the postfix main.cf the following lines were entered:

smtpd_tls_mandatory_protocols = !SSLv3
smtpd_tls_protocols = !SSLv3
smtp_tls_mandatory_protocols = !SSLv3
smtp_tls_protocols = !SSLv3

I cant send Mail on Zabbix Webinterface
On the server itself i can send an Email per Command Line but not on Webinterface
But the problem still exists...

Thank you in advance for your efforts

Dear,
Marcel

[Bagunda]

Same problem

[David_Yang]

Same problem.

[tim.mooney]

For both David_Yang and Bagunda , you haven't provided any details about your environment at all. That makes it less likely that someone is going to respond and try help, and even if someone does respond, it makes it less likely that they're going to be able to narrow down the issue.

The first guess I would make is that the SSL routines used by the web interface are either too old or too new to be able to successfully negotiate with whatever SSL library version is in use on your mail server. Of course, that's just a guess, because without details about your environment there's no way to know for certain. For example, recent versions of openssl have disabled SSLv2 and SSLv3, and some have disabled TLS1.0. If your web interface is using a recent version of PHP that is linked with a recent version of openssl, it may no longer be able to talk to a much older mail server.

Or, it could be the opposite problem: the mail server is linked to a recent openssl but you're running an old version of Zabbix with an old PHP, and it doesn't have SSL support for a new enough version. Or there's no common algorithm that both endpoints support.

Again, pure guesses without more info about your environments.

[David_Yang]

Due to we are located in China, so we use the 21vbluecloud base O365, it's different with MS O365. Detail configuration about the zabbix email configuration, please see attachement .

[David_Yang]

also, the php version is 7.2.24

[Rudlafik]

Mayby this help you. I had same problem:


:

[Rudlafik]

I try SSL check peer and host and this is work too.

[koha]

The following configuration worked for me: