email network connection failure

Hi there, janai.

Thanks for reaching out to us. I'm here to help resolve this issue so you can email a purchase order successfully. 

Are you using Gmail when sending email for Purchase Order? If so, you can use Secure Webmail for an easier and safer connection to your email provider. You can try setting up Secure Webmail.

Here's how:

1. From the QuickBooks Edit menu, select Preferences and click Send Forms.
2. Select Web Mail and click Add.
3. Select your provider from the drop-down and enter your email address.
4. Ensure that the Use Enhanced Security checkbox is checked.
5. Click OK.
6. When prompted, sign in to your Intuit account. The username or email address you use here may not necessarily be the same as the one you are connecting to QuickBooks.
7. Your webmail provider's login page will display. Sign in and choose to grant Intuit access. 

For additional reference, you can check this article: Set up email service.

However, if you're using an outlook email let's toggle the settings in the Preferences window. Here's how:

1. Go back to the Send Forms tab and select QuickBooks Email instead of Web Mail. 
2. Click OK.
3. Close and re-open the Preferences window.
4. Go back to the  Send Forms tab and change it back to Web Mail. 

If the issue still persists, I recommend calling our QuickBooks Desktop Support Team. They have additional tools to do a remote session and investigate this further. 

1. Click this link: https://slack-redir.net/link?url=https%3A%2F%2Fhelp.quickbooks.intuit.com%2Fen_US%2Fcontact.
2. Select the version of QuickBooks, click Contact Us.
3. Type-in Technical Support on the search bar. 
4. And click Get the Phone number below.

Please let me know how it goes. I'll be here if you have any questions. Have a good one. 

I came across this issue this morning. I can send invoices in other companies, but one in particular has this error message that pops up.

This fixed it:

Edit -> Preferences -> Send Forms -> My Preferences tab -> Send email using Web Mail -> clicked my email address -> Edit -> unclicked "Use enhanced security" -> OK

After I unclicked enhanced security, it worked just as it always has in my other companies.

Hello,

Others may still be coming across this issue.

I found that this error sometimes comes up due to sending an improperly named PDF attachment with the invoice. If the attachment has any characters that aren't English alphabet it will bring up this error.

For example I tried to send an attachment with the word "Mâché" in it and received the error. I changed the word to "Mache" and the invoice and attachment sent without issue.

We just encountered the same error but only on some emails and not on others. 2 purchase orders in particular were causing issues for us. We found that we could send them as "test" emails to single recipients, whether they were internal users or external addresses, but we couldn't send with more than one address per field on these 2 POs. Compared them to ones that were were able to send without issues and noticed that we had spaces after the semi colon before the first character of the next email address on the ones that were failing. I guess the system didn't like that. An error message that said something about formatting or invalid characters instead of the nonsense network connection failure error would've been nice. 

For reference, we are using M365 as our email provider and are using the enhanced security. Disabling enhanced security didn't work either but the issue was different as we couldn't even authenticate to try and send the email. 

Hoping this info helps someone out there since the error message certainly didn't help us at all.