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Gmail error code 17099 usually occurs when Simple Mail Transfer Protocol (SMTP) faces a problem while sending emails or it encounters an authentication error which further affects your storage files when you log into your Gmail account. Apart from the reasons mentioned, a slow or poor internet connection can also trigger Gmail Error code 17099

However, there are some simple yet effective troubleshooting methods to get rid of the Gmail error code 17099 and ensure the continued functioning of your Gmail account. The steps of fixing Gmail error code 17099 may vary depending upon the device you’re using but no need to panic because this blog will cover them all, one at a time so keep reading.

  1. Fix Gmail Error 17099 on Desktop

When you’re facing Gmail Error Code 17099 on Desktop, you need to rebuild the identity database in order to fix this problem. It can easily be done with the help of MS Database Utility.

To fix Gmail Error code 17099 on Desktop, the steps are as follows:

  • First of all, close all the applications that are currently running on your system.
  • Open Application browse and folder for Microsoft Office
  • Search for the MS Database utility and then double click on it.
  • In Database Utility Window, click on the OLM file that has to be processed and then click on Rebuild.
  • Now, a progress window showing Rebuilding Main Identity will appear.
  • A message will be displayed once the process is completed saying “Your database was rebuilt successfully”
  • Click on Done.

  1. Fix Gmail Error 17099 on Android

There are a few reasons why Gmail Error code 17099 shows:

I If you changed your device’s date or time

Make sure the date and time on your device are correct.

  1.           If you’re using public Wi-Fi

In case you’re connected to the Internet in a public place, you might have to complete some additional steps before you’re actually connected. Open the browser on your device and check if you need to sign in. Sometimes people get signed out automatically in order to protect their privacy.

If that doesn’t solve your problem here is how to fix Gmail Error Code 17099 on android:

  •     Open the Gmail app.
  •     On the top left, you will see an option called Menu. Tap on that.
  •     Next, tap on Settings.
  •     Then tap the account you’re having a problem with.
  •     In the “Server Settings” section, check to see if the information in “Incoming settings” and “Outgoing settings” is correct for POP or IMAP.
  •     In case it is not, you will have to contact customer support.

  1. Fix Gmail Error 17099 on iPhone

This Gmail Error Code 17099 can occur on iPhone due to an internal error. However, as a workaround, you can re-add the account as IMAP for the meantime.

Here is the process fix Gmail Error Code 17099 on your iPhone, do the following:

  • Go to Tools and click on Accounts
  •     Click on plus (+) symbol at the bottom of the screen then click on “New Account” and type in your Email address.
  •     Click on continue and then quickly click on “Choose the Provider” or choose “Not Gmail?” On top of the page
  •     Select IMAP / POP
  •     Enter all the information needed. Below is the incoming and outgoing information for reference:

             Type: IMAP

Username: Enter your  full email address

Password: Use the password you have for the app

Incoming Server: imap.gmail.com: Port Number: 993: Check the box for SSL

Outgoing Server: smtp.gmail.com: Port Number: 587: Check the box for  SSL

  •     Click on Add Account.

 

  1. Fix Gmail Error 17099 on iPad

The process for fixing Gmail Error code 17099 on an iPad is similar to the process of fixing Gmail Error code 17099 on the iPhone. This Gmail Error Code 17099 can occur on iPad due to some internal error. Meanwhile, as a workaround, you can re-add the account as IMAP.

Here is how you can fix Gmail Error code 17099 on an iPad:

  •     Go to Tools option and then click on Accounts
  •      Click on plus (+) symbol visible at the bottom of the screen.
  • Now, click on “New Account” and type in your full Email address.
  •      Click on continue and then click on “Choose the Provider” or choose “Not Gmail?” On top of the page
  •     Select IMAP / POP
  •      Enter all the information needed. Provided below is the incoming and outgoing information for reference:

Type: IMAP

Username: Enter your email address

Password: Use the App password

Incoming Server: imap.gmail.com: Port Number: 993: Check the                                              box for SSL

Outgoing Server: smtp.gmail.com: Port Number: 587: Check the box for  SSL

  •     Click on Add Account.

  1. Fix Gmail Error 17099 on Mac

If you are facing the Gmail Error code 17099 on your Mac and are unable to send any emails, with the help of the steps given below you can easily fix the Gmail error code 17099:

  • Close the application and restart your Mac PC-

(i)                 Close the application on your Mac Pc

(ii)              Now press the power button and click on shutdown

(iii)            Wait for the PC to complete the shutdown command.

(iv)            Once it is entirely powered off, wait for at least 20 seconds and then go ahead and power it back on.

(v)              Now open the outlook application and press the send and receive button.

(vi)            Check if the processor is still showing you the authentication error.

  • Clean the Outbox folder. Sometimes, Gmail error code 17099 appears on Outlook for Mac PC due to too many pending emails available in the outbox folder. This may interrupt the functioning of the Simple Mail Transfer Protocol or SMTP server. To clear all the pending messages on the outbox on you Mac PC, here is what you need to do:

(i)                 Open the Outlook Application

(ii)              Now select Gmail Profile

(iii)            Click on the outbox folder available on the menu on the left side

(iv)            If there are any emails in the outbox folder, select them and then press the delete button.

  • Check the internet connection. When you cannot communicate with Gmail through Outlook, you should check the internet connection on your PC. This could be the reason for the Gmail Error code 17099 showing on your Mac PC.
  • Rebuild the Outlook application. When the Outlook database is not functioning properly on the Mac PC, you will see Gmail Error code 17099. In such a case, you will have to repair the Outlook database. You can do so by following this process:

(i)                 Log into the MacBook using the admin user

(ii)              Close the Outlook application and also other applications that are currently running on your Mac PC

(iii)            Now open the application window and then click on Microsoft Office

(iv)            Now, click om the database utility option.

(v)              Here, you need to select the database and press the rebuild button and wait for the process to finish. Meanwhile, do not perform any operation on your PC.

  • Check the SMTP settings. Sometimes Gmail Error Code 17099 appears due to the Simple Mail Transfer Protocol error on the server. It is unable to authenticate the outgoing process from Gmail. To fix this Gmail Error code 17099 from appearing you need to follow the process given below:

(i)                 Open the Outlook application.

(ii)              Click on the outlook option from the menu and go to the preferences tab.

(iii)            Click on the Gmail account on which you are facing the error

(iv)            Enter Smtp.gmail.com in the outgoing address

(v)              Click on advanced button and enter port no 587

(vi)            Now enter the full email address and password in the outgoing username and password section

(vii)          Now press the OK button.

Now you should be able to get rid of the Gmail Error Code 17099 showing on your PC.

  1. Fix Gmail Error 17099 on iOS

The process for fixing Gmail Error code 17099 on an iPad is similar to the process of fixing Gmail Error code 17099 on the iPhone and both iPhone and iPad come equipped with iOS. Therefore, unsurprisingly, the process to fix the Gmail Error code 17099 on an iOS is the same.

Given below is how you can fix Gmail Error code 17099 on an iOS:

  •     Go to the Tools option and then click on Accounts on the device you are using.
  •     Now click on the plus (+) symbol that is there at the bottom of the screen.
  •     Now, click on “New Account” and type in email address of the account that is facing the Gmail Error Code 17099.
  •      Click on continue and then click on “Choose the Provider” or choose “Not Gmail?” On top of the page
  •     Select IMAP / POP
  •      Enter all the information needed. Provided below is the incoming and outgoing information for reference:

Type: IMAP

Username: Enter your email address

Password: Use the App password

Incoming Server: imap.gmail.com: Port Number: 993: Check the                                        box for SSL

Outgoing Server: smtp.gmail.com: Port Number: 587: Check the box for  SSL

  •     Click on Add Account.

Restart Outlook for iOS. If you wish you can delete the previously added account, once the newly added account is working fine, with the ‘Delete from this Device’ option.

Now you know how to solve the Gmail Error code 17099 on every device and hopefully the issue is solved. In case it isn’t, you can contact the customer support for further help and instructions.