# How to Fix Mailbird Sign-In Not Working Issues
Mailbird is a popular desktop email client known for its clean interface and multi-account support. However, like any software, users may sometimes face Mailbird sign-in not working issues. These problems can be frustrating, especially when you rely on email for daily communication. If Mailbird fails to sign in, don’t panic. Most sign-in issues are caused by simple configuration errors, outdated settings, or temporary connectivity problems. This guide walks you through the main troubleshooting steps, explained clearly and in order, to help you fix the issue quickly

# Step 1: Check Your Internet Connection
Before adjusting Mailbird settings, make sure your internet connection is stable.

1. Open a web browser and visit any website
1. Try logging into your email account directly through webmail
1. Restart your modem or router if needed

A weak or unstable connection can prevent Mailbird from connecting to the mail server.

# Step 2: Verify Your Email Address and Password
Incorrect login credentials are one of the most common causes of Mailbird sign-in problems.

1. Double-check your email address for typos
1. Re-enter your password carefully
1. Ensure Caps Lock is turned off

If you recently changed your email password, update it in Mailbird as well.

# Step 3: Check Mail Server Settings
Incorrect incoming or outgoing server settings can block sign-in.

1. Open Mailbird Settings
1. Go to Accounts and select the affected email account
1. Verify IMAP, POP3, and SMTP server details

Compare these settings with the official configuration provided by your email provider (such as Gmail, Outlook, Yahoo, or a custom domain).

# Step 4: Enable IMAP or POP Access
Some email services require IMAP or POP access to be enabled manually.

1. Log in to your email account via a web browser
1. Open account or security settings
1. Ensure IMAP or POP is enabled

Without this permission, Mailbird won’t be able to sign in.

# Step 5: Allow Mailbird Through Firewall and Antivirus
Firewall or antivirus software may mistakenly block Mailbird.

1. Temporarily disable your antivirus and test the sign-in
1. Add Mailbird to your firewall’s allowed apps list
1. Whitelist Mailbird in your antivirus settings

Once allowed, re-enable your security software and try again.

# Step 6: Use App Passwords (For Gmail or Outlook)
Some email providers block third-party apps unless you use app-specific passwords.

1. Enable Two-Factor Authentication (2FA) on your email account
1. Generate an app password from your email provider’s security settings
1. Use the app password instead of your regular password in Mailbird

This step is especially important for Gmail and Microsoft Outlook accounts.

# Step 7: Update Mailbird to the Latest Version

An outdated Mailbird version may cause compatibility issues.

1. Open Mailbird
1. Check for updates from the menu
1. Install the latest version if available

Updates often fix bugs and improve sign-in reliability.

# Step 8: Remove and Re-Add the Email Account
If the issue persists, resetting the account may help.

1. Go to Settings > Accounts
1. Remove the problematic email account
1. Restart Mailbird

Add the account again using correct settings

This clears corrupted configurations that may be blocking sign-in. **[Read More.](https://sites.google.com/view/mailbirdocs-customer-care/blogs/how-to-fix-mailbird-sign-in-not-working-issues-step-by-step-guide)**