Change mail-relay for smtp-client.

Is it possible to create a irule for the mail-relay changes depending on the RCPT TO for client behind F5BigIP.

 

For example:

 

If the RCPT TO: from the smtp-client then the client is connecting to mail-relay 192.168.0.1

 

If the RCPT TO: from the smtp-client then the client is connecting to mail-relay 192.168.0.2

 

If another RCPT TO from the smtp-client then the mail-relay does not change.