SMS Email Gateway reply problem

[#1]

I am creating an application that relays SMS messages through the AT&T email gateway in both directions.

That is, I send a short sms message to  subscriber@txt.att.net and get the reply (if there is one) at the same server that relays the initial message through the at&t gateway.  I need to do it this way, because the application is international and handles many different sms/email gateways and so I can't use a proprietary format (i.e. an API).

I have tested this method for some months now and it has worked well.  But just a few days ago, I started getting "InvalidPDUContent" messages when replying on the phone. I get these messages irrespective of the size of the reply that I'm sending -- sometimes it is a single word reply.  And sometimes the same message that got through a few minutes previously results in the InvalidPDUContent response a few minutes later.

I've also tried using the mms.att.net gateway, but still get the same problem.

Can anyone shed some light on this problem?

Thanks.

[#2 · Accepted solution]

Hi bhwatts,

Thanks for your post!

Can you confirm that you are still getting this error, there was a problem in production, and I'm told this has been fixed.

thanks!

[#3]

All tests today have been successful.

So it looks like your information is correct.

Shall I post to this thread if the problem resurfaces?

Thanks a lot for your help.

Brian

[#4]

Glad we got a solution.

Yes. Forum is a good place to post questions like this.

Other developers can benefit from your inquiry. Thanks.