553 You have a reverse DNS problem

[gripner]

Hi

Have DNS set up on a ISPconfig box

tryin to send mail to a person and i get this error msg back
553 You have a reverse DNS problem

Dont understand why tho, my dns config looks like this:
> set type=any
>
> ctisystems.se
Server: ns1.ctisystems.se
Address: 195.178.169.153

ctisystems.se
primary name server = ns1.ctisystems.se
responsible mail addr = support.ctisystems.se
serial = 2007022101
refresh = 3600 (1 hour)
retry = 1800 (30 mins)
expire = 604800 (7 days)
default TTL = 600 (10 mins)
ctisystems.se nameserver = sbs.ctisystems.se
ctisystems.se nameserver = ns1.ctisystems.se
ctisystems.se MX preference = 10, mail exchanger = sbs.ctisystems.se
ctisystems.se internet address = 195.178.169.153
ns1.ctisystems.se internet address = 195.178.169.153
sbs.ctisystems.se internet address = 195.178.169.154


And if i do a PTR lookup on sbs.ctisystems.se wich should be what needs to have a PTR right ? it looks like this :
> set type=PTR
> 195.178.169.154
Server: ns1.ctisystems.se
Address: 195.178.169.153

154.169.178.195.in-addr.arpa name = server1.ctisystems.se
154.169.178.195.in-addr.arpa name = sbs.ctisystems.se
169.178.195.in-addr.arpa nameserver = ns1.ctisystems.se
ns1.ctisystems.se internet address = 195.178.169.153
>



Anyone have any bright ideas?