Well, carriers (Verizon specifically) are starting to blacklist email to sms messages.
Of course, if you pay Verizon $100/mo they will white list you.
Any one know of a work around?
Yes we had to bite the bullet a year or two ago. The free service was no longer reliable. We get alarms from Factory Talk View to our WWT personel at night as no staff is on hand then. Sometimes the alarms would come in a day later or not at all.