question about online security

[dsj]

For all of those emails that pose as places like ebay and are supposed to get your credit card info, they always can be identified by their links address right? Like if the link they want you to click on is www.ebay.com/xxxxxxxxxxxxx no matter what follows if it starts with ebay.com then it can't be not from ebay right? The same with email, if it ends with something lik @microsoft.com then it can't be from anyone else right?