Marginally operational, but I'm sure there are at least a few folks using
that service as part of monitoring, so it probably bears mentioning.
AT&T appears to be having an email-to-SMS gateway issue. Messages sent to
xxxyyyyyyy@txt.att.net are not being delivered to handsets. No bounce, but
no delivery either. As a workaround, messages sent to
xxxyyyyyyy@mms.att.netdo do get delivered. Confirmed in the NYC metro
area and in Chicago at the
moment.