Many people responded to me directly, so I thought I would summarize my findings. 1) AT&T Customer Service never returned my call, despite saying they would. I guess they couldn't get to the right folks. The occasional curse of being in a really large company. 2) A very kind inside AT&T person from this list replied to me privately and informed me that they had just cut over to a new gateway for the consumer mail-to-SMS service and that they were experiencing some issues with it. Perhaps the issue was a massive influx of messages when they brought the system back, but that is just me speculating. Doesn't explain the message body corruption issue, though. 3) Someone let me know that AT&T Wireless has a business offering called Enterprise Paging: http://www.wireless.att.com/businesscenter/solutions/email-messaging/enterpr... This costs about $5.00 extra per month and offers a separate email-to-SMS gateway and other SMS injection methods: WCTP, SNPP, TAP . This service uses 10-digit-number@page.att.net as the gateway email address format. Another benefit is longer messages - up to 456 characters. This can be helpful. I opted for upgrading to Enterprise Paging. Solved the issue for me, seems reliable, and offers options that give me value. Also has 24/7 support and (apparently) some sort of SLA. Other reports indicate the @txt.att.net consumer gateway has settled down after the issues from last week. Hope this helps some folks. -Dave