[rt-users] sendmail problem

[Harald Volz]

Hi list,
I am new to RT and have a problem with sendmail and rt 2-0-15
Trying to reply to a ticket mail, the mail bounces by Version Sendmail 8.12.6
  ----- The following addresses had permanent fatal errors -----
"|/opt/rt2/bin/rt-mailgate --verbose --debug --queue Adastra --action
correspond"
    (reason: 255)
    (expanded from: <suadastra at linuxnms.junese.de>)

   ----- Transcript of session follows -----
Can't do setuid
554 5.3.0 unknown mailer error 255

 12 -rwxr-sr-x    1 rt_user  rt           9145 Mar 11 18:58 rt-mailgate

maybe this is the problem?
The queue-sender (Correspondence Address) is suadastra at junese.de (I need this for our mail system) but the mail comes to suadastra at linuxnms.junese.de

Any hints?

kind regards
harald