Why can't centos send mail after installing sendmail and mailx?

[duncan98]

Why can't CentOS send mail when sendmail and mailx are installed? The configuration example is as follows:
/etc/mail.rc

set from=bp**@outlook.com
set smtp=smtp.office365.com
set smtp-auth-user=bp**@outlook.com
set smtp-auth-password=1234
set smtp-auth=login

[dthacker9]

What are the mail logs saying?

[duncan98]

What are the mail logs saying?

hi,dthacker9
When I send the email, it prompts the error message: SSL/TLS Failure: Unknown error-5938.Is there anything wrong with my certificate?

[pjsr2]

Which port number did you configure? Should be in the setting for relay_host. Default port is 25. I think outlook.com wants 587 for STARTTLS to function.

[duncan98]

Which port number did you configure? Should be in the setting for relay_host. Default port is 25. I think outlook.com wants 587 for STARTTLS to function.

Yes, I have set SMTP= smtps://smtp.outlook.com : 465, or 587. The above prompt still appears。You may be talking about the configuration of Postfix

[pjsr2]

error message: SSL/TLS Failure: Unknown error-5938.Is there anything wrong with my certificate?

Error-5938 is related to establishing the SSL protocol connection. It is the SSL-certificate on the server you are connecting to that is used for the encryption of the connection and verification of the identity of the server. Your own certificate is not used at this point.

Did you try the following in mail.rc?

Code: Select all

set smtp-use-starttls
set smtp=smtp.office365.com:587

[duncan98]

error message: SSL/TLS Failure: Unknown error-5938.Is there anything wrong with my certificate?

Error-5938 is related to establishing the SSL protocol connection. It is the SSL-certificate on the server you are connecting to that is used for the encryption of the connection and verification of the identity of the server. Your own certificate is not used at this point.

Did you try the following in mail.rc?

Code: Select all

set smtp-use-starttls
set smtp=smtp.office365.com:587

Yes, I've set it, but it prompts the same error

[duncan98]

Problem solved, thank you