Sending accounts in GlockApps are used to perform automatic tests and run email tests via proxy email addresses. Thanks to built-in integrations, you can quickly connect GlockApps with your Gmail or Google Workspace account, Outlook, Hotmail or Office 365 account. Additionally, you can integrate GlockApps with the SMTP settings of email service providers and delivery services that allow to use their SMTP servers in third party applications.
Below are the steps to connect to your Google account from GlockApps:
In your account, go to Inbox Insight -> Sending Accounts.
Click “Create Sending Account.”
Type your sending accout name. It can be any name in order you can recognize the sending account in the dashboard.
Select Gmail as your email service provider.
Click “Continue with Google.”

Select the Google account you want to connect with. Go through the login and verification process if needed.
Next, click “Continue.”

Put the check mark for the “Send email on your behalf” option.
Click “Continue.”

If the connection is successful, your Google account will appear in the Primary Settings.

Next, you can configure additional settings.
Header Settings
When sending your message to the seed list, GlockApps will only retain certain message headers such as ‘MIME-Version’, ‘Content-Type’, ‘Reply-To’, ‘List-Id’, ‘List-Unsubscribe’, and ‘Subject’.
However, if you wish GlockApps to retain other message headers, list them in the field separated by commas.
Additionally, you can type a name and value of a new header field to be added to the message headers while sending your message to the seed list.
Click “Add Custom Headers” to add a new custom header field.
When done, click “Save”.
If no custom headers are needed, skip these settings.

Proxy Testing
A proxy testing mode allows you to send the message to a single proxy email address instead of the whole seed list. The message will be then re-sent to the chosen seed list via your sending account.
The proxy testing eliminates the steps involved in the manual testing and provides a quick and easy email testing option.
To be able to use this mode, you have to generate a proxy email address that will be associated with the sending account.
To do this, click “Add Proxy to this Sending Account.”

Verify the selection of spam filters and inbox providers for proxy testing. You can remove the check marks next to the providers that you don’t want to use.
Throttling
Next, set the email throttling if required.
By default, GlockApps, will send the message to the full seed list at one go. To spread email sending over time, click “Change Throttling.” This may be a safer sending mode if you are concerned about your email reputation or if the sending account has any restrictions or limitations.

Choose the “Emails will be sent sequentially, one email every xx seconds (minutes, hours)” option.
Clock “Done.”

Folder for Proxy Tests
Next, you can choose a folder to save the tests made via a proxy email address to.
By default, the tests will be saved to the Home folder in Reports > Proxy Tests. You can choose a different folder or create a new folder right from the menu.
Link Checker
GlockApps verifies the links used in the email to provide you with a report about valid and invalid URLs. The exception is the unsubscribe link which is not followed.
You can disable the Link Checker for proxy tests if you don’t use URLs in the messages or don’t want to have the links clicked.
When you are done with the settings, click “Create Proxy Address.”

Your sending account will appear in the main dashboard together with a proxy email address. You can copy the proxy email address and send an email to it to have it tested.
You can re-generate a proxy email address by clicking on three dots.

Read also: What’s Causing the 550 SMTP Error and How to Fix It?
Connection Errors and Troubleshooting Tips
If something is blocking the connection to the SMTP server or you did not grant the necessary rights to GlockApps, you may receive an error when running an automatic test or a proxy test. Check the list of the the most common errors and troubleshooting tips below:
Error 403: Request had insufficient authentication scopes.
The server response is returned when you didn’t grant full access to GlockApps, especially the right to send emails on your behalf.
To resolve this, click on the sending account name in Sending Accounts, click on the arrows near the email address and re-connect to your Google account. Ensure to give full rights, especially the right to send emails on your behalf.
Then you can re-run the automatic test or a proxy test.