That's the issue. TLSv1.1 & TLSv1.2 are only support in openssl-1.*
You could disable TLS for this email address (https://serverfault.com/questions/562234/disable-starttls-on-qmail-for-outgoing-messages).
Or, you could upgrade manually openssl on CentOS 5 (https://miteshshah.github.io/linux/centos/how-to-enable-openssl-1-0-2-a-tlsv1-1-and-tlsv1-2-on-centos-5-and-rhel5/).
Eric On 3/9/2018 8:30 AM, Rvaught wrote:
Version .9.8e-33.el5_11 *From:*Eric Broch [mailto:ebr...@whitehorsetc.com] *Sent:* Friday, March 09, 2018 10:26 AM *To:* qmailtoaster-list *Subject:* Re: [qmailtoaster] Mail Failure What version of openssl is on your host? # rpm -qa | grep openssl On 3/8/2018 11:22 AM, Rvaught wrote: I am getting this failure when trying to send mail to one email address. The error is TLS connect failed: error 140770FC: SSL routing: SSL 3_GET_SERVER_HELLO: unknown protocol. It appears your server wants a TLS or SSL connection or certificate. I am running a qmail toaster on Centos 5.11. How can I tell what version TLS I am using? The support person on the other end says they do not accept version of lower than TLS 1.1 or 1.2. Thanks , Rick -- Eric Broch White Horse Technical Consulting (WHTC)
-- Eric Broch White Horse Technical Consulting (WHTC)