my ip public -- >SORBS SPAM blacklist

finally i can reply ... wow .. i like this website ..amazing ..and respond quickly .. ill read 1 by 1

HI everyone ..

i got this issue this morning when sending email to outside organization ..

AM1FFO11FD024.mail.protection.outlook.com gave this error:
Service unavailable; Client host [my ip public] blocked using FBLW15; To request removal from this list please forward this message to [email protected]

i can send to yahoo and gmail without any problem, and also only occured to some of my customer email .

any suggestion, really need this help soon

Thanks
Shyb