Can not send emails to anyone with an @bigpond.com address

JB 1

I am getting the following error:

550 5.4.300 Message expired -> 451 4.4.397 Error communicating with target host. -> 421 4.4.2 Connection dropped due to ConnectionReset

Any help is appreciated.

Thanks,
JB

Aholic Liang-MSFT 13,871 Reputation points Microsoft Vendor

2022-10-06T08:48:53.037+00:00
Hi @JB ,
To narrow down the issue, could you tell us about the configuration of your organization’s environment?
Does this issue occur only when sent to the specified domain (@bigpond.com)? Please try sending messages to other domains to see if the issue persists.
In addition, as a workaround, please refer to the following command to create a new send connector for the specify domain to see if the issue persists.

New-SendConnector -Name ForceHelo -AddressSpaces problemdomain.com -ForceHELO $true

http://www.networkadminsecrets.com/2010/04/421-and-451-exchange-2007-errors.html

Note:Microsoft provides third-party contact information to help you find additional information about this topic. This contact information may change without notice. Microsoft does not guarantee the accuracy of third-party contact information.

3 answers

JB 1 Reputation point

2022-10-06T10:30:35.53+00:00

So this occurs on every set up including webmail and it is only @bigpond.com that is the issue. I can receive emails from them just not send them. Every other domain is issue free.
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Aholic Liang-MSFT 13,871 Reputation points Microsoft Vendor

2022-10-07T06:08:32.15+00:00

Hi,
Did you create the new send connector for this specify domain? Has the issue changed?

Aholic Liang-MSFT 13,871 Reputation points Microsoft Vendor

2022-10-11T09:37:07.3+00:00

Hi,

It has been a few days and I am checking in to see how things are going on with this issue.
Does this issue have any updates?

Aholic Liang-MSFT 13,871 Reputation points Microsoft Vendor

2022-10-17T08:31:08.923+00:00

Hi @JB ,
It has been a few days and I am checking in to see how things are going on with this issue. Do you perhaps have any further concerns or questions?
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Sreedhar K 0 Reputation points

2023-09-13T00:15:40.23+00:00

Hello JB,

We have rectified the issue by calling Telstra Bigpond team. Please ask for the SPF/Reputation record. You have to add Bigpond in your SPF once done, try to send it will work.

Regards,

Sreedhar K
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Nilesh Kahar 0 Reputation points

2024-06-12T10:29:56.6666667+00:00

Hi Sreedhar,

We are getting this issue today for 3 customers, can you please let me know what exactly needed to be updated?

TIA,

Nilesh.
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Can not send emails to anyone with an @bigpond.com address

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