I'm very tired HELP :Postfix does not send email reply from RT4

i have Rt4.4.3 work fine with fetchmail for inbound and postfix for outbound
when i send an email to my RT adress i have a ticket created but the email notfy the sender caused a problem or when i try to transfer a ticket from rt i have a problem:

you can see the log in /var/log/mail.log

" relay=smtp.xxxxx[x.x.x.x]:25, delay=0.28, delays=0.01/0/0.26/0.01, dsn=5.1.1, status=bounced (host smtp.xxxxxx[x.x.x.x] said: 550 5.1.1 www-data@xxxxx: Recipient address rejected: xxxxxx (in reply to RCPT TO command))
"
i dont find the problem because my postfix work fine when i test this from command line (ubuntu)
thanks for help

wajdi schreef op 2018-12-03 14:42:

wajdi [1]
December 3

i have Rt4.4.3 work fine with fetchmail for inbound and postfix for
outbound
when i send an email to my RT adress i have a ticket created but the
email notfy the sender caused a problem or when i try to transfer a
ticket from rt i have a problem:

you can see the log in /var/log/mail.log

" relay=smtp.xxxxx[x.x.x.x]:25, delay=0.28, delays=0.01/0/0.26/0.01,
dsn=5.1.1, status=bounced (host smtp.xxxxxx[x.x.x.x] said: 550 5.1.1
www-data@xxxxx: Recipient address rejected: xxxxxx (in reply to RCPT
TO command))
"
Make sure you have an email address www-data@xxxx or use an existing
else the recieving smtp server will reject your email.

Greetings,

Joop

thanks for reply
when i try to test postfix from command line i have an email sent without problem
but when i try to send and email from RT4.4.4 i have the problem " Couldn’t load custom field by ‘Announcement Groups’ identifier
"