I can help you with that, myshem.

To successfully send your invoices using an alias email (the additional email address associated with your webmail or Outlook account), you'll have to connect it first to your QuickBooks Desktop. You can follow the steps that I've listed below.

For Outlook:
 

1. Select Edit from the sidebar menu.
2. Choose Preferences.
3. Go to the Send Forms section.
4. From the My Preferences tab, Select Outlook and then click OK.
5. Follow the on-screen instruction to add your alias email

For webmail:
 

1. Select Edit from the sidebar menu.
2. Choose Preferences.
3. Go to the Send Forms section.
4. From the My Preferences tab, click the Add button and then add the email address.
5. Choose the Email Provider, and select OK.
6. Once done, click OK again.

I encourage reading this guide to learn more about the process: Connect your email to QuickBooks Desktop. Once you're all set up and ready, it's time to create and send your invoices.

With QuickBooks Desktop, you can also use and customize form templates so your customers will recognize your brand.

I'm just a post away if you need more help in completing your other tasks. Have a great rest of the day.

But my alias is from Gmail/Google and it doesn't work 

Any plans to incorporate this in the future? Would be really helpful as I currently do business under a Gmail alias and would really like to send invoices from my company's domain, not the primary account domain. 

Hello there, @Russix.

I can see how this option would be beneficial to you and other QuickBooks users.

We don't have an exact time as to when the feature will be rolled out. However, we can send your valuable feedback to our Product Development team. You'll need to open your QuickBooks Desktop to share with us your insights about the feature you want to include in the program. Here's how:

1. Go to the Help menu.
2. Select Send Feedback Online. Then, click Product Suggestions.
3. Enter a brief details about it.
4. Click Send Feedback.
   

Still, you can use these articles for additional information about emailing invoices within your company file:

• Connect your email to QuickBooks Desktop.
• Use your Gmail address to send invoices.

We always want to hear your suggestions as we continue developing the product as best for your business. Feel free to comment below if you have other concerns with QuickBooks. Take care always.

I am following this thread. I agree it would be incredibly helpful to be able to use an email alias for emailing invoices through QuickBooks online. Is there any update on when this feature may be available? Thank you!

I appreciate you dropping by here in the Community, @TAArch,

 I know how helpful this option is to you and the other users. 

We don't know exactly when the feature will be implemented. However, we can forward your feedback to our Product Development team. To provide us with your insights about the feature you want to see in the program, you'll need to open your QuickBooks Online (QBO).

Follow these steps how:

1. On your QBO account, go to the Gear icon.
2. Then select Feedback.
3. Enter a brief detail about it and click Next. 

I'll share this article so you can read it if you want to check the latest QuickBooks news and features: QuickBooks product updates.

We always want to hear your suggestions, as we continue to develop the product to be the ideal fit for your company. Let us know if you require further assistance with your QBO account. The Community team is here to help anytime. Have a great day!

10 years from now:

" I know how helpful this option is to you and the other users. 

We don't know exactly when the feature will be implemented. However, we can forward your feedback to our Product Development team. To provide us with your insights about the feature you want to see in the program, you'll need to open your QuickBooks Online (QBO)...."