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Throttled - try again later

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Throttled - try again later

This has just gotten really annoying in the last week. We send a message to a dozen adresses, two or three of which are Comcast addresses, and Comcast returns the "Throttled" error RL000003 for those Comcast customers. I see other posts regarding this issue. Has anyone found a reasonable solution? Since the domain our e-mail uses is on a large hosting service, we don't have access to e-mail sending servers to adjust retry rates, etc.

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Frequent Visitor

Re: Throttled - try again later

No one has replied to this. No help from a Comcast employ like others posing this issue have received, promising more information via DM. I've talked to tech support for our e-mail server and it is not a problem from our end. I've no desire to waste time on the phone with poorly trained Comcast support. This is really frustrating and Comcast needs to straighten it out.

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Expert

Re: Throttled - try again later


@pastorbily wrote:

No one has replied to this. No help from a Comcast employ like others posing this issue have received, promising more information via DM. I've talked to tech support for our e-mail server and it is not a problem from our end. I've no desire to waste time on the phone with poorly trained Comcast support. This is really frustrating and Comcast needs to straighten it out.


The Help & Support forums are primarily a customer-to-customer help forum.

 

However, a simple Google search would have led to this:

 

https://postmaster.comcast.net/smtp-error-codes.php#RL000003

 

RL000003 :: Mail to Comcast is queued and I see RL000003 in my email logs. What does this mean?

Comcast has instituted rate limiting on all inbound email traffic. This step was taken to protect our customers and our email system from unwanted spam and malicious attacks. Any systems affected by this rate limit will receive a 4xx message (temp-fail) during the SMTP transaction. This message is designed to instruct the sending server to try again at a later time to deliver its email.

 

This rate limiting policy is based on historical volumes and quality of that volume. The limits applied are independent of the number of domains originating from a given IP. This policy should apply to both IPv4 and IPv6.

 

New IP addresses that are expected to send significant amounts of email to Comcast subscribers should start by sending low volumes of mail, increasing as time goes on. As your IP sends more email, its limit will increase daily.

 

If the rate-limit is impacting your ability to deliver email, shortening your server's delivery retry interval should resolve the issue.

 

If you require additional assistance, please contact Customer Security Assurance at 888-565-4329.


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Re: Throttled - try again later

I don't know why you assumed I hadn't already seen that Comcast information page about the error code. I have and it is not helpful at all. The one concrete suggestion, shorten SMTP server retry interval, is not available to most anyone who is utilizing a hosting service rather than running their own servers. Moreover, that suggestion is a work-around rather than addressing the problem which Comcast's own security policies and procedures have created.

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Expert

Re: Throttled - try again later


@Bilynskyj wrote:

I don't know why you assumed I hadn't already seen that Comcast information page about the error code. I have and it is not helpful at all. The one concrete suggestion, shorten SMTP server retry interval, is not available to most anyone who is utilizing a hosting service rather than running their own servers. Moreover, that suggestion is a work-around rather than addressing the problem which Comcast's own security policies and procedures have created.


I don't know why you didn't notice the post wasn't directed at you....


I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!