SSL/TLS Handshake Failure when Connecting to SMTP Server

Hello,

I'm encountering an issue with establishing an SSL/TLS handshake when trying to connect to the SMTP server mail.ezonlinetools.com from my Contabo server.

Here's the command I'm using:
openssl s_client -connect mail.ezonlinetools.com:587 -starttls smtp -tls1_2
openssl s_client -connect mail.ezonlinetools.com:587 -starttls smtp
openssl s_client -connect mail.ezonlinetools.com:465 -starttls smtp

`openssl s_client -connect mail.ezonlinetools.com:587 -starttls smtp -tls1_2
CONNECTED(00000003)
140242699470736:error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure:s3_pkt.c:1493:SSL alert number 40

140242699470736:error:1409E0E5:SSL routines:ssl3_write_bytes:ssl handshake failure:s3_pkt.c:659:

no peer certificate available

No client certificate CA names sent

SSL handshake has read 265 bytes and written 0 bytes

New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : 0000
Session-ID:
Session-ID-ctx:
Master-Key:
Key-Arg : None
Krb5 Principal: None
PSK identity: None
PSK identity hint: None
Start Time: 1710152538
Timeout : 7200 (sec)

Verify return code: 0 (ok)

`
I'm not able to establish a secure connection with the server.
Please help me to resolve this issue.

Thanks.

I'm reaching out to understand the delay in the approval of my recent forum post. While I've noticed that other posts are getting approved promptly, mine is still awaiting approval.

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can you please help me to resolve this.

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Centos

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