Sending an e-mail to 104 e-mail users, I did it last month and the month before, it is only a Newsletter, this month it comes back as too many recipients.

Question

Sending an e-mail to 104 e-mail users, I did it last month and the month before, it is only a Newsletter, this month it comes back as too many recipients.

Pamela Thurbin 0

recipients. I havetried sending it to a Group and also tried sending it in two lots but it still comes back as too many recipients. I have even tried to send an e-mail to a friend, nothing to do with sending the group Newsletter, and it won't even let me do that. How can I increase the number of recipients I can send the monthly Newsletter to?

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3 answers

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Answer 1

Lucus-V 13,210 Microsoft External Staff Moderator

Hi Pamela Thurbin,

If you were able to send your newsletter to 104 recipients in previous months, that number alone would not normally be expected to trigger a recipient limit. However, Outlook.com can apply temporary sending restrictions or lower sending quotas based on account activity, usage history, or account reputation. Since you mentioned that you are now unable to send even a message to a single friend, the issue may be related to your account's ability to send mail rather than the number of newsletter recipients.

Could you please provide a bit more information?

Are you using an Outlook.com, Hotmail, Live, MSN, or Microsoft 365 email account?
What is the exact error message you receive when sending?
Are you sending from Outlook on the web or from an Outlook desktop/mobile app?
Can you send successfully from Outlook on the web (if you normally use the app)?

The exact error message will help determine whether this is a recipient-limit issue, a temporary sending restriction, or another account-related problem.

Pamela Thurbin 0 Reputation points

2026-09-07T17:38:50.4733333+00:00
I am using Outlook.com and I don't have aq Microsoft 365 account. IU have copied over the message I( am receiving, it is followed by all the recipients e-mail addresses

This message was created automatically by mail delivery software. A message that you sent has not yet been delivered to one or more of its recipients after more than 24 hours on the queue on [--PII REMOVED--]
Pamela Thurbin 0 Reputation points

2026-09-07T17:44:06.8933333+00:00

I saend e-maios from my desk top computer.

It is strange that I can't send just one e-mail to a friend, totally nothing to do with the Newsletter.

I have also had notification that there will be a 48 hour delay in sending my email to the recipients, this is no good to me as we are meeting tomorrow and they should have received their Newsletter before the meeting.

I should mention I am 'old' - 88. I can do most basic things but not anything technical. Pam Thurbin
Lucus-V 13,210 Reputation points Microsoft External Staff Moderator

2026-09-08T15:12:00.8966667+00:00
Hi Pamela Thurbin,

Please note that our Microsoft Q&A forum is a public platform, and we will modify your response/ question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.

You mentioned that you send emails from your desktop computer. Do you use:

a web browser and sign in at Outlook.com, or

an email program installed on the computer (such as Outlook, Windows Mail, or another mail app)?

Also, if possible, please copy the last few lines of the non-delivery report. That part usually contains the actual reason for the delay or failure.
Lucus-V 13,210 Reputation points Microsoft External Staff Moderator

2026-09-13T16:34:22.57+00:00

Hi Pamela Thurbin,

I hope everything is going well on your end. Just wanted to check in and see how things are going for you lately, anything you'd like to share or discuss?
Pamela Thurbin 0 Reputation points

2026-09-14T08:47:39.0033333+00:00

Yes I am using Outlook.com and I haven't got Microsoft 365 email account.
Pamela Thurbin 0 Reputation points

2026-09-14T08:49:56.9233333+00:00

Things aren't going too well! I sent the Newsletter out many times and it came back as undeliverable. It seems that some members got it 10 times, some didn't get it at all. I gave up in the end and printed off some hard copies., I need to get this sorted by the time the October Newsletter is due. I also received this:

[--PII REMOVED--] gave this error: Access denied, sending domain NTLWORLD.COM doesn't meet the required authentication level. The sender's domain in the 5322.From address doesn't meet the authentication requirements defined for the sender. To learn how to fix this see: https://go.microsoft.com/fwlink/p/?linkid=2319303 Spf= Pass , Dkim= Fail , DMARC= Fail [--PII REMOVED--]
Lucus-V 13,210 Reputation points Microsoft External Staff Moderator

2026-09-14T15:45:26.9933333+00:00

Hi Pamela Thurbin,

Please note that our Microsoft Q&A forum is a public platform, and we will modify your response/ question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.

This indicates that messages sent from NTLWORLD.COM email address are failing modern email authentication checks. Because of this, some mail systems are rejecting or delaying them, which explains why some members received multiple copies while others received none.

Unfortunately, email authentication (SPF, DKIM, and DMARC) is controlled by the email provider that owns the NTLWORLD.COM address, not by Outlook.com itself.

You may need to contact the email provider (Virgin Media, which manages ntlworld.com addresses) as the authentication settings for that address appear to be failing.

At this point, the evidence suggests that the issue is with the ntlworld.com sending domain authentication, not with Outlook.com's recipient limits.

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Answer 3

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