Problem with receiving text response for email sent to txt.att.net/mms.att.net - length restriction?

Thanks for your response. 

I am able to send an email to a phone number [email scrubbed] and it arrives fine.

If I send the email from an address that is short (like [email scrubbed]) then when I reply from the text, I receive a response just fine.

But when I send the email from a very long email address, when I reply to the text message, the response is never received.

it "seems" like an issue with long email addresses. i'm just looking for confirmation.

Greetings @mkickliter,

Thank you for reaching back. We want to look into this more closely.

We are curious to know:

• when did this actually start
• have you been able to receive replies from long email addresses in the past
• do you have control over the type of email your messages originate from (short vs long)

Let us know so we can probe further.

Doyin, AT&T Community Specialist.

Hi Doyin,

This started last week and is still occurring today. Honestly, last week was the first time I tried to send from the long email address.

I've never received replies from long email addresses, but I've only tried this recently.

Because I'm sending the email from within Salesforce, I need the response to return back into Salesforce. Salesforce generates this long email address to uniquely identify my email service. As a result, I can't control the length of the email address.

FYI the address is [email scrubbed]

This is from a test org. But all addresses generated by Salesforce are long like this, to allow the platform to uniquely identify the inbound email handler.

Thanks for your questions and I appreciate your help in this matter. 

oops the email is client_referral_email_service at r-1sa8esu9lz6fqz0ytii0yeddti8v8giyyz2cr8qulqmtito7er.2d-dn1kuaw.cs69.apex.sandbox.salesforce.com

Thank you for reaching back, @mkickliter.

We are curious to know if you have an AT&T service and if you are using an AT&T email service. The salesforce application, is it in any way affiliated to AT&T? Also, are the emails and texts targeted at AT&T customers or customers from multiple carriers.

Let us know so we can assist further.

Doyin, AT&T Community Specialist.