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Emails sent to hotmail domains are returned undelivered

Anonymous
Not applicable

Hi

 

Any emails I send to hotmail accounts are returned undelivered with the following message

 

550 OU-001 (COL004-MC2F2)Unfortunately, messages from 78.***.17.** weren't

    sent. Please contact your Internet service provider since part of their

    network is on our block list.

 

Any ideas how I resolve this?

Message 1 of 13
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12 REPLIES 12

adamtemp64
Level 66: Unequalled
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Registered:

@Curr946 wrote:
wasnt o2 BB sold?

Only the consumer side business customers were never sold 

iPhone 11 Pro 256gb on unlimited data
iPad Pro 12.9” 2020 256gb refresh o2 family discount
Apple Watch series 4
My first mobile was in 1995 a CM-R111 from sony on Cellnet.
Wincanton South Somerset (Full 4g 3G 2g indoor coverage) Remember we are all customers here not customer services

Message 11 of 13
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MI5
Level 94: Supreme
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Registered:
Had a feeling about that but wasn't 100%
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)
Message 12 of 13
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adamtemp64
Level 66: Unequalled
  • 16454 Posts
  • 312 Topics
  • 1316 Solutions
Registered:

@MI5 Yes being an ex business user we were still being marketed to swap to adsl etc until the closure of the business last year . Now we are all on consumer contracts .

iPhone 11 Pro 256gb on unlimited data
iPad Pro 12.9” 2020 256gb refresh o2 family discount
Apple Watch series 4
My first mobile was in 1995 a CM-R111 from sony on Cellnet.
Wincanton South Somerset (Full 4g 3G 2g indoor coverage) Remember we are all customers here not customer services

Message 13 of 13
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