Your joining application was rejected due to a number of factors making your
application suspicious. Various elements pointed towards this account being
wittingly or unwittingly used to violate our muti-account rules. It is
possible that you share the IP address of an existing player, this is
usually caused by already having an account or sharing a connection with an
existing player, please contact firstname.lastname@example.org. Please contact
us for further information regarding the rejection of your application or
refer to the Character Creation rules page located at
http://rules.swcombine.com/character/charactercreation/ for more
information. if any one can help me please post
Have you ever had an account here? Accounts aren't deleted.
Did you try to register previously, but never received a response? Players seem to regularly find themselves unable to spell their e-mail address correctly, and if an account attempt gets approved, all subsequent attempts are rejected on the basis of violating the multi rules.
Did you attempt to register twice in rapid succession instead of waiting for one application to be approved? That would result in both being declined, and occasionally that will be the rejection message.
If none of those are the case, you should try registering again, and this time include your handle or e-mail address in this thread so we can take a look at why you're appearing as a multi.
Your ISP is your internet service provider. Most internet providers offer e-mail addresses along with their service. Any e-mail address you are able to sign up for free on the internet is not valid for registration here.