Re: Outbound TLS

[Nick Howitt]

As far as I know Google use STARTTLS on port 587 and not port 25. Have a look at https://www.clearos.com/resources/documentation/clearos/content:en_us:kb_howtos_smtp_authentication_to_isp to see how to set up relaying via STARTTLS. A word of caution though. I believe Google rewrites the from header or reply-to header to the user name you use to authenticate. This means if you are sending for multiple users with different gmail accounts, you may need to investigate smtp_sender_dependent_authentication and sender_dependent_relayhost_maps. Nick On 13/02/2016 11:49, Christian Kivalo wrote: Am 13. Februar 2016 11:10:25 MEZ, schrieb Joy <pj.netfil...@gmail.com>: May i know how can i force postfix to use TLS if remote MTA advertises STARTTLS on port 25 to connect to remote server ? I am already using TLS and connecting from outlook is working perfectly, but when sending mail to google it now says TLS fail. Take a look at http://www.postfix.org/DEBUG_README.html#mail and provide all necessary information At least postconf -n / postconf -Mf and log output of the tls fail to google - Christian