Here is the law and while "notice" is not specifically defined in the law, you are basically sending these people an eviction notice. I'm sure that someone smart enough to be involved in a foreclosure process and with the notification requirements that go along with that process can plainly see that such a notice to a tenant via e-mail is not going to hold up in the court of law when the tenants then seek to sue the bank for not protecting their rights. I'm sure they don't "e-mail" a right of cure to the consumer and tell the judge that yes, all requirements for foreclosure have been followed
By the way, the regulators have been hammering on this regulation in the latest series of exams in our area.
SEC. 702. EFFECT OF FORECLOSURE ON PREEXISTING TENANCY.
(a) IN GENERAL.—In the case of any foreclosure on a federally related mortgage loan or on any dwelling or residential real property after the date of enactment of this title, any immediate successor in interest in such property pursuant to the foreclosure shall assume such interest subject to—
(1) the provision, by such successor in interest of a notice to vacate to any bona fide tenant at least 90 days before the effective date of such notice; and
(2) the rights of any bona fide tenant, as of the date of such notice of foreclosure—
(A) under any bona fide lease entered into before the notice of foreclosure to occupy the premises until the end of the remaining term of the lease, except that a successor in interest may terminate a lease effective on the date of sale of the unit to a purchaser who will occupy the unit as a primary residence, subject to the receipt by the tenant of the 90 day notice under paragraph (1); or
(B) without a lease or with a lease terminable at will under State law, subject to the receipt by the tenant of the 90 day notice under subsection (1), except that nothing under this section shall affect the requirements for termination of any Federal- or State-subsidized tenancy or of any State or local law that provides longer time periods or other additional protections for tenants.