Comcast throttling emails

@XfinityAmira Thank you for replying. They couldn't help and had to escalate then I never hear back. Is there a way to submit a ticket without having to call?

Unfortunately, there is no way to submit a request to our Customer Security Assurance team, and you would have to contact them directly by phone. I would strongly recommend reaching back out to them again, as they are the experts in handling situations such as this. They are available from 8:00 AM - 12:00 AM ET/Seven days a week. 

@XfinityCSAEmail​ I've sent several messages with no response. Still being throttled.

@user_d21800

I am sorry that @XfinityCSAEmail has not responded to your messages. I will be happy to help in any way I can. First, I want to be sure that I understand the question. You are running up against the email limit when sending emails. Is this on a Residential account or a Comcast Business account?

Our Residential accounts have the following email limits:

- 100 recipients per email.

- Up to 1,000 recipients per day. If an account exceeds the 1,000-recipient limit, the account will not be able to send for the remainder of the day.

Our Comcast Business accounts have the following email limits:

- 100 recipients per email.

- 1,000 outbound emails per hour. One email sent to 100 recipients is counted as 100 outbound emails. If you send 10 emails, each of which are going to 100 recipients, you will reach the 1,000 emails-per-hour limit.

@user_d21800​ Good morning, 

Apologies for the delayed response. Just to confirm the understanding of email throttling, its a temp-fail and is not a "your email will be delayed by X amount of time". Essentially any emails(numerically) over a certain threshold will get a notice to try and send again later due to sending too many emails to us already. This is generally set up with your email provider with a retry interval (sendgrid in your specific example) where the configuration will recognize the "try again later" and do just that. Resend the throttled emails an hour later. Checking our logs, approx. 2% of total traffic in a 24h basis is getting rate limited which equates to single digit amounts of emails. To further elaborate, speed of the sending has no relevance to the email throttling - if lets say your established threshold is 80 emails/h and you send all 80 within 2 seconds or space them within the hour its going to make no difference to the throttling threshold of allowed total traffic. In short, as long as your resend policies are configured correctly via sendgrid, you should continue to send the emails in blasts instead of spacing them out for delivery. Regardless, I have made an exception in the policy once more, please feel free to update us should you continue to see issues going forward.