We appreciate you bringing this to our attention, @DFlyght.

I see the importance of sending emails to your customers seamlessly. I'll give you some reasons why the invoices are spammed and help you resolve this issue. 

If your customers imported their data from QuickBooks Desktop to QuickBooks Online, resetting their email address is necessary. Let's do this as our initial step.

1. In your QuickBooks Online account, go to Settings and select Account and settings. 
2. In the Company section, click on Edit in Contact info.
3. Review each email address and make changes as needed.
4. Select Save, then Done.    

Also, we can have your customers clear and re-enter their email addresses to refresh the setup.

1. In Settings, select Account and settings then go to the Company section.
2.  Select Edit in Contact info.
3. Clear the Company email field and re-enter the desired address. 
4. Select Save, then Done.

If your customers get the same issue, they can add Intuit email as a safe sender. Please refer to this article Receive important email messages from Intuit. 

Please feel free to reach out again if you have any follow-up concerns. I'll be here to help. 

I spent 6 hours researching and trying all of these 1st and 2nd step fixes before I ever even posted.

None of this is going to work for this issue.

Went through the first two processes.

we have 1200 customers on monthly billing 

whether they get an invoice is very random, they can get in for months and months with no problem then all of a sudden a month will go to spam

its unfair to ask me to get my customer to make sure that they whitelist Intuit when I never know what customer can be affected.

it affects our cashflow and makes us look amateurish 

please can you flag for a priority resolution we never had this problem when we had the desktop version 

I can see how hard you've tried here, @DFlyght and @C2Safety.

Being able to experience unexpected issues isn't easy and I understand how this has affected your workflow. No worries, I'm here to assist you further and provide the best route so this can be properly isolated.

Since you've already performed the recommended steps provided by my colleagues above, I'd suggest getting in touch with our Technical Support Team given that they have all the tools to further look at this in a secure manner. This way, they'll be able to find the root cause of this and provide you with a permanent fix so you can continue with your business activities and send your customer their invoices and any other important business-related messages.

I'd be glad to include the steps on how you can contact our Support Team for your reference:

1. Go to the Help icon and select Contact us in the Search tab.
2. From the What can we help you with field, enter your question.
3. Click on Continue.
4. Choose either Appointment, Callback, or Chat.

Be sure to get in touch with them within their business hours to get timely assistance.

Additionally, here's an article that'll help you learn how to add Intuit's service email addresses to your email's allow list: Receive important email messages from Intuit.
 

We're here to help you every step of the way. If you have any additional questions or need further assistance, please don't hesitate to hit the Reply button. Our dedicated team is ready to provide the support you need to ensure your communication with your customers is seamless. Your satisfaction is our priority, and we're committed to helping you succeed.

Yes don’t use there server if you want to get paid ! 

Emails have been going to clients' spam more and more for me lately. I talked + chatted with a total of four reps at QB today probably 2.5hrs of time and three of them blamed me, blamed my clients or their ESPs, and didn't listen to the points I was making. The last rep listened to everything I said, understood it, was nice about it...and told me there was nothing she (or her supervisor) could do and that I couldn't communicate with engineering, despite them being the only people that could solve this. So here I am...

- i haven't changed anything in my process but have had more issues with invoices being filtered as spam (old and new clients)

- I cc myself to my own domain name email and it comes through, I never get errors that it didn't send and my clients always find it in spam (it IS delivered just not to the inbox for them)

- deleted and re-entered my email addresses in settings like it says at the beginning of this thread (and also changed my phone number which for some reason had an Egyptian country code rather than a US one)

- I googled what can cause emails to get filtered by spam and the MAJORITY of the reasons I found had to do with the content of the email sent (AKA whatever QB puts in it both font end and under the hood)

- I didn't ask every one of my clients to unblock the quickbooks email address (several reps' suggestion) because the likelihood that they manually marked it as spam is next to zero AND having to ask clients to do extra work is the exact opposite reason why I use your billing software! Garbage suggestion!

I submitted feedback about this in the web app but also wanted to put it here because 1) I was annoyed about the problem 2) I was enraged by the deflection of blame and flawed troubleshooting by the majority of QB employees I spoke with 3) wanted to add to the thread

The whole point of paying for QB is so that I can streamline billing. If I have to come up with all these hacky or clunky workarounds for your spam-magnet emails, what's the point? I may as well go back to creating them in Microsoft Word and attaching via PDF. I never had any of those go to spam.

Bringing a legitimate problem to customer service and having these interactions is so frustrating. Reading this forum thread makes me realize I was on point that it is, in fact QBs' problem to fix. Quit blaming your customers and fix this!

I appreciate this but this is a high likelihood this goes out of date soon.

I am still having this issue with QB Desktop.  I use outlook to send invoices and estimates and clients aren't receiving them because they go to spam.  I called my email host yesterday and we ran a lot of scenarios and the biggest culprit was QB naming the file with underscores.  (ex. Invoice_5000_from_ABC Company.pdf) When I moved the file to desktop, took out the underscores, and move file back into email the email sent to inbox instead of spam.  This is not an ideal workaround but it did seem to work.

"this goes out of date soon" what is the "this" you are referring to?