No mail after switching hosts

Hi,

I've just recently switched hosts and I have clients not being able to send me email.

This is the error they get returned.

>>> RCPT To:<user@domain.com.au>
<<< 550-Host mailserver [xxx.xx.xx.135] is not permitted <<< 550-to relay through manta. <---- note this domain is not complete ???
<<< 550-Perhaps you have not logged into the pop/imap server in the last 30 minutes. <<< 550-You may also have been rejected because your ip address <<< 550-does not have a reverse DNS entry. <<< 550 relaying to <user@domain.com.au> prohibited by administrator 550 5.1.1 <user@domain.com.au>... User unknown

My clients who are hosted with me can send and recieve email to everyone else except me No mail after switching hosts

This is a reseller account.

Any help would be appreciated as my host is stumped No mail after switching hosts and I need to try and resolve this ASAP. Any clues?

I suspect it being the reverse DNS but I can't do anything from my end.

 

 

 

 

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