My email gets rejected

Using /e/OS murenacloud
1

Hi,

I started using my @murena.io email address recently and noticed that two emails didn’t arrive, one of which bounced with a message stating that part of the Murena network is on a blocklist.

I’m aware that Murena has had issues with spam by customers in the past which might explain this.

My question is if someone is working on this and if there is some timeline for when this will be fixed.

I need to be able to trust that email that I send will arrive (or at least bounce).

Best regards,

Andres

2

I think that specifics are appropriate in an issue like this, but required if anyone was to try to ameliorate.

1 Like
3

It just occurred to me that using a vpn when sending mail from my phone might be the problem, as I use the mail client on my phone.
In which case: apologies, I could have thought of that sooner. I forgot to exempt the mail client from ip hiding.

I sent a test message to my hotmail account, this is the reply I received:

"
This is the mail system at host mail2.ecloud.global.

I’m sorry to have to inform you that your message could not
be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

               The mail system

<[redacted]@hotmail.com>: host
hotmail-com.olc.protection.outlook.com[52.101.10.0] said: 550 5.7.1
Unfortunately, messages from [135.181.6.248] weren’t sent. Please contact
your Internet service provider since part of their network is on our block
list (S3150). You can also refer your provider to
Troubleshooting. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11BB032C1E80DCD3]
[BN2PEPF0000449D.namprd02.prod.outlook.com 2025-04-24T06:54:35.031Z
08DD8196116D1AFB] (in reply to MAIL FROM command)
Van: “[redacted]@murena.io” <[redacted]@murena.io>
Aan: [redacted]@hotmail.com
Verzonden: Thu Apr 24 05:49:58 GMT+02:00 2025
Onderwerp: Test
– Verstuurd met /e/OS Mail.
"

Best regards,

Andres

4

My son has been having the same problem for at least two weeks and maybe up to a month: Whenever he sends Murena email messages to anyone on outlook.com email, the messages bounce with the same type of error message @Andres reports from outlook.com. This has also been reported elsewhere: Can’t send email to Microsoft addresses - /e/OS Devices / Murena - /e/OS community, Not able to send mails to Hotmail accounts - Using /e/OS / Troubleshooting - /e/OS community, and Email rejected by outlook.com - Using /e/OS / Applications - /e/OS community.

Furthermore, my son has the same issue from his T2e and from his computer (both from webmail and an email client), regardless of what type of internet connection he is using. Yesterday, I followed the instruction in the bounce message: “Please contact your Internet service provider since part of their network is on our blocklist (S3150).” Our ISP checked everything on their end and noticed no blocks. They suggested that the problem is on the email sending server and that we should contact the email provider. Any updates on this problem?

5

This happened to me about a year ago, and from what I can tell it was an issue with a relay server in Germany. This got sorted last year so can’'t understand what is taking so long. I can’t email my eldest. HelpDesk were trying to resolve this issue, but clearly it is still an issue. Whilst this is ongoing I am using Proton Mail to family members who have Microsoft mail accounts (outlook.com and hotmail.com)

1 Like
6

I’ve been having troubles sending emails to hotmail accounts for some weeks. I can send emails to accounts at gmail or other providers, but sending mails to hotmail give the following error:

Subject: Undelivered Mail Returned to Sender

This is the mail system at host mail2.ecloud.global.

I’m sorry to have to inform you that your message could not be delivered to one or more recipients. It’s attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system <private name @hotmail.com>: host hotmail-com.olc.protection.outlook.com[52.101.73.17] said: 550 5.7.1
Unfortunately, messages from [135.181.6.248] weren’t sent. Please contact
your Internet service provider since part of their network is on our block
list (S3150). You can also refer your provider to
Troubleshooting. [Name=Protocol
Filter Agent][AGT=PFA][MxId=11BB1AF925E2A177]
[AMS0EPF0000019D.eurprd05.prod.outlook.com 2025-05-09T09:37:55.709Z
08DD8D7C955887D2] (in reply to MAIL FROM command)

Is there a solution to this? As several of my contacts stick to hotmail it’s kind of showstopper for switching over to Murena / e/os.

7

Issue is being followed up with Microsoft. We have not received a response from MS as yet.

8

I too have same issue when I send messages to hotmail accounts.

9

I experience the same issues, resulting with the same replies of the mail system at host mail3.ecloud.global, when sending emails at [@outlook.com>].
Thank you Manoj for following this issue, we are all awaiting for a solution.
Cordialement

10

Same issue here. I am using Thunderbird on a laptop.

Happy to provide my bounce messages if helpful.

11

We are awaiting a clear response from Microsoft. What we have got so far are automated response mentioning that our IPs are not blocked. That being said the email delivery is still failing. Our team has sent these failure messages to the Microsoft support team and awaiting further investigation and response from their side.
I will update on the progress.

12

So I was able to send an email on Monday May 28 2025 from e.email to a hotmail.com account but not today?

14

no, I followed up in your thread. This thread is about microsoft big whale mail shenanigans

16

I doubt you will get a response due to MAGA policy makers telling MS what to do:

And a recent change in their protocols:

https://cybersecuritynews.com/microsoft-to-block-emails/

17

Perhaps the hotmail users need to be open to using a free murena account:

18

no again, this thread is about being blocklisted with a specific error code MS offers.

550 5.7.1 .. (S3150) - or S3140

your article would

  1. yield another error code 550 5.7.15 Access denied and
  2. uses by now seasoned standards (spf,dkim,dmarc) murena.io complies with anyway - even Spammers do more so than not

this threads issue isn’t about ICC politics either.

it’s about statistics MS doesn’t like about a sending domain and/or IP range. You’d need to know murenas exact outbound stats to outlook on a daily basis to determine if it’s justified and what triggered it.

MS offers a stats sharing program (SNDS / JMRP) that goes beyond DMARC to get insight into what they see from your IP / IP range.

19

It happened last year too but the thread was never updated with iformation:

When I had the issue myself last year it was found to be an issue with a relay server. Has this been looked into?

Currently having to use proton mail to send mail to the accounts that are getting rejected when using murena.

20

if the 550 5.7.1 references “S3150” blocklist it can be grouped to this: Mails (MSN, Hotmail) sent from Murena blocked by Microsoft (#8380) · Issues · e / Backlog · GitLab

a newly created outlook account says it won’t accept murena mail yet, pointing to S3150 still.

this years threads on this started in early april, most are linked to the top entry. I guess once you spiked their heuristics it’s back and forth until getting a new chance.

21

I don’t use any MS mail addresses these days. And my website uses the hosting company’s mail system so not affected like other MS users in the past who have multiple worksites and valid MS accounts. At least I have Proton Mail to fall back on.