GMAIL Authentication Failed with Outlook, Thunderbird, iPhone, etc. (Solved)

Description of "Gmail Authentication Failed" problem: You cannot connect to your Gmail account with Outlook or with any other Email client program or Mail app (e.g. Thunderbird, iPhone Mail App, Windows Phone Mail App).
For example, whenever you try to connect to your Gmail account, with Outlook, subsequently asked to verify your user name and password in the account properties because your e-mail server rejected your login (even if your credentials are correct).

The "Gmail server rejected your login" issue, while connecting to Google Mail (GMAIL) with your E-mail client, is caused because Google has turned off the basic authentication for new accounts.

In this tutorial you'll learn how to configure Google settings in order to allow Outlook, Thunderbird or other email program, to access your Gmail and bypass the "Google Mail Authentication Failed" problem (Server rejected your login – Google Mail).

How to Configure Google Account Settings & Fix the GMAIL Authentication Failed problem with Outlook, Thunderbird, iPhone, etc.

Step 1. Enable POP Download or IMAP access in GMAIL.

1. Sign-In to your Gmail account from your desktop/laptop computer.

2. Select the Gear icon on the top right and choose Settings.

3. Select Forwarding and POP/IMAP.
4. Enable POP if you want to configure an POP3 Gmail account with your e-mail program, or Enable IMAP to configure an IMAP account.
5. When done, Save changes.

6. Navigate to this link https://www.google.com/settings/security/lesssecureapps and Turn on the Access for less secure apps.

7. Proceed to Step-2 and add your Gmail account to your E-mail client program (Outlook, Thunderbird, iPhone Mail, etc.).

8. Test your your GMAIL account settings in your Email client program or app. If you still face authentication problems, then proceed and disable also the "2-Step verification" (9).

9. Optional: Apply this action only if you still face login problems in your e-mail client:

– Navigate to this link https://myaccount.google.com/security#signin, and Turn Off the 2-Step verification.

Step-2: Setup GMAIL with your E-mail Client Program

– After making the required changes to your Google Account settings, (as described in Step-1) proceed to add (setup) you GMAIL account to your e-mail client program (Outlook Thunderbird, iPhone Mail App, etc.).

IMAP GMAIL Settings

– If you want to setup an IMAP Gmail account apply the following settings:

Full Name (Display Name): You Full Name
Email address & Username: Your Full Gmail Address (e.g. j.pery123@gmail.com)
Password:    Your Gmail password

Incoming Mail (IMAP) Server name: imap.gmail.com
Requires Encrypted Connection: Yes: SSL
SSL Port: 993

Outgoing Mail Server (SMTP) name: smtp.gmail.com
Outgoing Server Requires Authentication: Yes
Requires Encrypted Connection: Yes: SSL (or TLS/STARTTLS)
SSL Port: 465
(TLS/STARTTLS Port: 587)

Example: Outlook Gmail Settings POP3

POP3 GMAIL Settings

– If you want to setup a POP Gmail account apply the following settings:

Full Name (Display Name): You Full Name
Email address & Username: Your Full Gmail Address (e.g. j.pery123@gmail.com )
Password:    Your Gmail password

Incoming Mail (POP3) Server name: pop.gmail.com
Requires Encrypted Connection: Yes: SSL
SSL Port: 995

Outgoing Mail Server (SMTP) name: smtp.gmail.com
Outgoing Server Requires Authentication: Yes
Requires Encrypted Connection: Yes: SSL (or TLS/STARTTLS)
SSL Port: 465
(TLS/STARTTLS Port: 587)

Example: Outlook Gmail Settings IMAP

Did it work for you?
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Konstantinos Tsoukalas

Konstantinos is the founder and administrator of Repairwin.com. Since 1995 he works and provides IT support as a computer and network expert to individuals and large companies. He is specialized in solving problems related to Windows or other Microsoft products (Windows Server, Office, Microsoft 365, etc.).

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