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Emails being blocked to certain addresses by uri.cal1.sophosxl.com

For some time now, some emails that I have been sending from Outlook are bouncing.

At the moment an email arrives informing me of the following error:

554 5.7.1 Service unavailable; Sender address [xxx.yyy@xyz.com] blocked using uri.cal1.sophosxl.com
 

Does anyone know how it can be solved?

Added tags
[edited by: Raphael Alganes at 11:41 PM (GMT -7) on 4 Jun 2023]

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Vivek Jagad over 2 years ago +1

Hello Jorge Benítez , Thank you for reaching out to the community, would request you to submit a sample .

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0 Vivek Jagad over 2 years ago

Hello Jorge Benítez,

Thank you for reaching out to the community, would request you to submit a sample.

Thanks & Regards,
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Vivek Jagad | Team Lead, Technical Support, Global Customer Experience

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0 Jorge Benítez over 2 years ago in reply to Vivek Jagad

Dear Vivek Jagad

A few days ago I sent an email to the address not-spam@labs.sophos.com but I have not received a response.
Could you help me please.

0 Vivek Jagad over 2 years ago in reply to Jorge Benítez

Hey Jorge Benítez, upon submitting the samples to Sophos Labs, you'll never receive a response, but based on your request i.e. false positive or false negative they'll rectify the reported issue in 4-5 business working days, I would request you to please check whether or not the issue still exist or not ?

Additionally you can let me know the subject line , your email address and date when you submitted the sample to not-spam@labs.sophos.com

Thanks & Regards,
_______________________________________________________________

Vivek Jagad | Team Lead, Technical Support, Global Customer Experience

Log a Support Case | Sophos Service Guide
Best Practices – Support Case | Security Advisories
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0 Jorge Benítez over 2 years ago in reply to Vivek Jagad

Hi Vivek Jagad

The email was sent on Friday, October 21 with the subject "Submit a sample" and the email from which it was sent is "jorge.benitez@elsystec.com.ec"

I appreciate your kind help friend.

0 josepalad over 2 years ago in reply to Jorge Benítez

Jorge Benítez Greetings! I have checked our lab's not-spam queue and found that the sample was malformed. Please make sure that the steps within the KB article https://support.sophos.com/support/s/article/KB-000033422?language=en_US is followed and try sending again. I will see if anything can still be done from the current received email sample and will update you either from a new case or here. ALSO, please make sure that what you send us is the original email that was blocked/stopped by the product. This should be in the "Sent" folder of the sender account.
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+1 josepalad over 2 years ago in reply to josepalad

Jorge Benítez I spoke with our labs and it looks like the affected domain/URL was categorized as spam source before - probably due to a previous issue. Anyway, this detection has now been corrected. Please try sending a new email and let us know if the issue persists or not. Thanks!
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0 Jorge Benítez over 2 years ago in reply to josepalad

Hi josepalad and Vivek Jagad , I appreciate your great help, we can now send messages to the domains where the emails bounced. Greetings friends
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0 Jorge Benítez over 2 years ago in reply to josepalad

Hi josepalad and Vivek Jagad , I appreciate your great help, we can now send messages to the domains where the emails bounced. Greetings friends
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