We recently upgraded from Exchange 2010 to Exchange 2016 and everything appeared to have went well, but we seem to have lost one minor function. On our UNIX host we have a bunch of automated processes and when these processes succeed they send an email to our IT department distribution group, but when they fail they send notification to another IT distribution group which includes our Verizon mobile numbers so we receive notification of failures as a text message to our phone. This worked just fine using exchange 2010, but since the upgrade to 2016 it no longer works.
I can send an email directly from my PC's outlook to this group containing our mobile numbers and I receive the text message, it appears to be just when the email is sent from our host to this distribution group via the 2016 exchange server that it doesn't work. The notification still goes to our work email addresses, just not to our phones. I changed my contact in the exchange server from my mobile number to my personal Gmail account thinking it was just a problem with sending the notification to an outside email, but that isn't the case because I received the email to my personal email account. So it appears to just be a problem when the host is trying to send a notification to @vtext.com.
Does anyone happen to have any ideas why this function might no longer be working?