Eric, That fixed my problem emailing to that domain.
Thanks so much for your help, Rick From: Eric Broch [mailto:ebr...@whitehorsetc.com] Sent: Friday, March 09, 2018 5:07 PM To: qmailtoaster-list@qmailtoaster.com Subject: Re: [qmailtoaster] Mail Failure So, If you want to stop TLS for a particular domain as QMT will encrypt via TLS all SMTP traffic unless 1) a mail server does not support it, 2) incompatible encryption (your case), 3) you prohibit it for a certain domain (following example), do the following: 1) # nslookup -type=mx 'domain.tld' domain.tld mail exchanger = 0 mx.domain.tld. 1) mkdir /var/qmail/control/notlshosts/ 2) touch /var/qmail/control/notlshosts/mx.domain.tld This will stop all traffic to domain.tld from being encrypted. Eric On 3/9/2018 9:17 AM, Eric Broch wrote: I'm not sure it will work. It installs side by side with old rpms openssl and openssl-devel. I'd try creating the notlshosts/<fqdn> first, and let me do some experimenting. On 3/9/2018 9:14 AM, Rvaught wrote: Thank you, I will give this a try. Rick From: Eric Broch [mailto:ebr...@whitehorsetc.com] Sent: Friday, March 09, 2018 10:50 AM To: qmailtoaster-list@qmailtoaster.com Subject: Re: [qmailtoaster] Mail Failure In fact, here's a binary https://centos.pkgs.org/5/epel-x86_64/openssl101e-1.0.1e-11.el5.x86_64.rpm.html and the how to 1. Download the latest epel-release rpm from http://dl.fedoraproject.org/pub/archive/epel/5/x86_64/ 2. Install epel-release rpm: # rpm -Uvh epel-release*rpm 3. Install openssl101e rpm package: # yum install openssl101e On 3/9/2018 8:47 AM, Eric Broch wrote: 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) -- Eric Broch White Horse Technical Consulting (WHTC) -- Eric Broch White Horse Technical Consulting (WHTC) -- Eric Broch White Horse Technical Consulting (WHTC)