Since 7th of april i'm getting a 450 host down smtpauth.rollernet.us entry in my logfiles on outgoing mails. Appearantly i'm not able to deliver mail to smtpauth.rollernet.us, not outgoing mail is possible.
Receiving mail works perfectly.
Last weekend i've switched from ISP. But i've checked my open port 587, that's fine. Also i've checked if i can telnet to smtpauth.rollernet.us, that's fine to.
Am i missing something? Is there something else I can check?
Thanks in advance for any help!