Updates to High Volume Email (HVE) Public Preview

Is it possible to add the HVE account to Outlook? Chipper2225​ 

To echo what others have been posting, when will we have pricing information for HVE?

We are working on a solution for our MFPs as well and looking in to 3rd party options since we have 0 information as to what the pricing will be. 

Our use case for HVE isn't High Volume Email, but rather multifunction device scan-to-email via basic authentication. Currently, this is achieved using a licensed Exchange Plan 2 account with all services disabled except for SMTP Auth.

The 10 MB attachment size limit for HVE is a significant obstacle for our use case, hindering a seamless migration.

jim0thy raises some excellent points. It feels like this rollout is rushed, with the deprecation of SMTPAUTH and HVE entering public preview in the same month. We still don't have pricing information and now we'll be paying for a service that was previously included in a P1/2 license. Additionally, there's a lack of feature parity for customer use cases like attachment size and reply-to functionality.

We also want to utilize this option for some of our systems that use the SMTP Basic Authentication now. It would be very helpful if this solution also support Send As to support replying to that Send As mailbox

Given that you're killing Basic Auth in September 2025 and this is only going live in September 2025, it would help if more details for pricing was available soon. We have many multifunction devices and apps not capable of Oauth so this is serious time pressure for us.

It makes it very hard to properly plan when the actual details are so vague. I'd rather not engage another third party service for this if I can but we need to know where we stand.

hi,   with regards to "The message size limit for HVE is 10 MB".  We are testing the HVE and everything seems to be working for us except for the size limit.   

We have some users that scan multiple pages the resulting to larger attachment size.. 

will there be plans to have the limit adjustable? or can it be adjusted?

also interested on the pricing...

Great news but we really need a higher limit than 2000 for external recipients to make this a valid replacement för other SMTP solutions.

Hi Simone_Liebal, we are already trying out HVE in our environment and look forward to using it more broadly. Are there any plans to relax the current strict requirement that the sender name/email match the HVE username? For our intended use cases, we are concerned this current requirement could lead to HVE account sprawl.

For example, one of our vendor applications has multiple modules that send emails, so that today we use sender addresses like mailto:email address removed for privacy reasons, mailto:email address removed for privacy reasons, mailto:email address removed for privacy reasonsand so on. Our users find it valuable to have differentiated sender addresses for email inbox rules. I would like to create one HVE account, such as mailto:email address removed for privacy reasons to be used across the server and still be able to send from all these addresses, rather than have to create multiple HVE accounts. Will this be possible in the future?

I have a customer who are using HVE for sending scanned documents from a multi function printer, and they are often bumping into the message size limit when trying to send larger documents. This was not a problem when they used a dedicated mail user with an Exchange Online license. Will it be possible to increase the message size limit for HVE accounts?

Faber77 Thank you for sharing additional details! Let me start with your second question: If you have configured SPF and DMARC / DKIM accordingly for your tenant, then yes this applies to HVE as well. 
On your first question: I'd like to understand your migration needs further - I'll reach out to you through private message, so we can discuss your specific case in detail there. 

ThomasOeser thank you for your question! I understand that the pricing model is an important factor in choosing the right solution for you! HVE will have a pay-as-you-go model similarly to Azure Communication Services (ACS) for email. Currently we are still in the process of finalizing pricing and will be able to share more information soon!

Charles_Delautre thank you for your question! The message size limit for HVE is 10 MB, which includes all content - headers, text, attachments & metadata. If you notice that messages below this limit do not go through, please report an issue so we can investigate further!