I've had the same Events and notifications set up for many years and haven't had any problem.  Most of them are sent to my cell phone.  Since upgrading to 15.7.6698 these notifications haven't been reliable.

 

 

[2018.05.22] 08:47:35 [8f869] Sending remote mail to: redacted@tmomail.net
[2018.05.22] 08:47:36 [8f869] CMD: RCPT TO:<redacted@tmomail.net>
[2018.05.22] 08:47:36 [8f869] RSP: 250 Recipient <redacted@tmomail.net> OK
[2018.05.22] 08:47:40 [8f869] RSP: 550 permanent failure for one or more recipients (redacted@tmomail.net:550 Empty envelope senders not allowed)
[2018.05.22] 08:47:40 [8f869] Delivery for  to redacted@tmomail.net has completed (Bounced)

 

Now here's the Delivery Log for the exact same notification that worked.  Notice the difference is that a valid From: is included in the notification that worked.  

 

[2018.05.22] 12:19:42 [82938] Sending remote mail to: redacted@tmomail.net
[2018.05.22] 12:19:44 [82938] CMD: RCPT TO:<redacted@tmomail.net>
[2018.05.22] 12:19:44 [82938] RSP: 250 Recipient <redacted@tmomail.net> OK
[2018.05.22] 12:19:48 [82938] RSP: 250 OK (redacted@tmomail.net:250 Ok: queued as 46E645E1517)
[2018.05.22] 12:19:48 [82938] Delivery for myemailaddressredacted@domain.com to redacted@tmomail.net has completed (Delivered)

 

The other interesting thing to note is that neither of the above appear in the SMTP Log at all... I guess because it's a system generated message.

 

I've spent hours on the phone with T-Mobile techs and I have to agree with them that the failed messages are being sent without a valid From:  So this has to be a SmarterMail issue.

 

Thanks,

-Joe