[rt-users] RT 4.4 failing to send CC emails

[Todd Wade]

On 4/19/16 7:34 AM, Luke Hopkins wrote:
> Apr 19 11:21:34 rt_test sendmail[42]: u3JBLYOs000042: u3JBLYOt000042:
> DSN: "OtherRecipients of xxxxxx Ticket #402":;... List:; syntax
> illegal for recipient addresses

Are you setting $UseFriendlyToLine? Can you confirm its value via Admin 
 > Tools > System Configuration (/Admin/Tools/Configuration.html)?

Its documented to not work with sendmail 
(https://docs.bestpractical.com/rt/4.4.0/RT_Config.html#UseFriendlyToLine), 
and from what I can find online this error appears to be the error you 
get from sendmail using it 
(http://www.gossamer-threads.com/lists/rt/users/96285).

Regards,