What are the sending limits on email to SMS (gateway)?

  • 1
  • Question
  • Updated 3 years ago
  • Answered
I'm looking to find out what the sending limits are when sending emails to my phone# on Koodo's own email to SMS gateway.  

Eg. Sending an email to your own phone # in the email address format:

Eg X number of emails per hour.

I was sending warning messages from temperature monitoring software, and obviously ran into the sending limits.  After a while I started to receive email notifications below from our mailserver warning that the emails that were being sent were being delayed by Koodo.

... while talking to msg.koodomobile.com.:
RCPT To:<5554441234@msg.koodomobile.com>
<<< 452 Too many recipients received from the sender
<5554441234@msg.koodomobile.com>... Deferred: 452 Too many recipients received from the sender
Photo of jamie.m


  • 100 Points 100 badge 2x thumb

Posted 3 years ago

  • 1
Photo of Yannick


  • 43,998 Points 20k badge 2x thumb
Hi Jamie, interesting question! It seems that it has been flagged by our anti-spam system. We may be able to help you out though and resolve this issue but, for that, we need to have access to your account. Can you send us an email with the information above using that link: http://koo.do/11eMLdy? Make sure to select the category "Social Media", otherwise it will be hard to find your email. Along with the above (and the phone number :) ), we would need more info:
- date/time the messages were attempted. 
- an example date/time when an email to sms was delivered successfully

We can't guarantee a positive outcome but I can assure you that we'll do our best! Thank you very much!  
Photo of jamie.m


  • 100 Points 100 badge 2x thumb
Thanks Yannick, I've just sent in an email using the link above to the Social Media category - Koodo Community section.

Unfortunately I did delete all the SMS messages.
The first set of emails did get through, it was later ones that got delayed.

I could also re-create the problem by setting the alert level much lower to re-create what happened.

3 emails were being sent out. 
Repeating every 10 Minutes, 8 Minutes, and 20 minutes if the temperature was still above the alert level.

As a side note, it was also CCing the same message to a 555123456@msg.telus.com destination, so I suppose if that system is the same as the Koodo one then the email volume would be double.
Photo of BobTheElectrician


  • 57,352 Points 50k badge 2x thumb
Both email address are valid for getting texts on Koodo. You may have overdone it a bit.

Stop sending to both. Just send to Telus and cut down the frequency of the alerts. Your temperature monitoring system set-up has all the hallmarks of a spammer: regular sending of the same email to several regular addresses on the same server (Telus & Koodo share) at precise intervals.

Count yourself lucky you didn't just win the Nigerian lottery...
Photo of jamie.m


  • 100 Points 100 badge 2x thumb
Hi Bob,

  The email recipients are for different people, I'm not sending it two ways to the same recipient.

The duration of these emails is only for as long as the temperature has been exceeded, normally maximum about an hour.

An example of when this happens is after the room starts to warm up because the primary AC unit is offline (or power has been cut), then these alerts will be triggered. They cease when a secondary AC has kicked in to bring the temperature back down.

Note: I'm sending these to myself, and a co-worker, so if I want them - can you call that spam?

I agree that the number of email alerts are probably overkill, but that's precisely why I'm asking what the limits are.

And what's wrong with winning the lottery? :)