‘Mortgage servicer’ means a person who directly services a mortgage loan, or who is responsible for interacting with a borrower, managing a loan account on a daily basis, including, without limitation, collecting and crediting periodic loan payments, managing any escrow account or enforcing the note and security instrument, either as the current owner of the promissory note or as the authorized agent of the current owner of the promissory note. The term includes a person providing such services by contract as a subservicing agent to a master servicer by contract. The term does not include a trustee under a deed of trust, or the trustee’s authorized agent, acting under a power of sale pursuant to a deed of trust.