# How do I stop ISPs blocking my emails?

I sent 3700 emails and 800 were undelivered to Hotmail and outlook accounts. The following week hotmail and outlook worked but BTinternet emails were blocked. It seems a bit hit and miss.

##### Post Metadata
- Posted at: over 6 years ago
- Author title: Local Village News Editor
- Net upvotes: 1


## Comments
### Comment 1

I believe you would purchase a dedicated IP address from them in order to increase the deliverability. It is around $150 USD. 

##### Comment Metadata
- Posted at: about 6 years ago
- Author title: Business Manager



### Comment 2

Hello, 

Send your question at

zendesk-box@sendinblue.com 

FD

##### Comment Metadata
- Posted at: over 6 years ago
- Author title: Créateur de Mode / Fashion Designer




## Related Product
[Brevo Marketing Platform](https://www.g2.com/products/brevo-marketing-platform/reviews)

## Related Category
[Email Marketing](https://www.g2.com/categories/email-marketing)

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