Then open it again to see if that resolved the issue. Swipe right until you find the mail app, and swipe the app itself up to kill it. Swipe up from the bottom of your screen until the app carousel appears. So it’s quite possible that your Mail app has not been closed for months or even years. RELATED: How to Reboot Your Router and Modem Kill the Appīoth iOS and iPadOS are aggressive about keeping an app’s memory state in long-term storage. For a completely clean new slate, consider resetting your network connection on-device as well. Turn off your router and your modem (if they are separate devices) wait a minute or so and then turn everything on again. ![]() Most connection issues to an Internet Service Provider (ISP) are resolved by disconnecting from it, waiting a few minutes, and then connecting again. Although both your device and the mail server may be fine, it’s possible that your local internet connection has developed an issue. ![]() This specific fix can be used by Mac users who also installed Adguard on their computers.The first thing to try is a different internet connection or a reset of your connection. This certificate was signed by an unknown authority Fix 3 – Whitelist Safari in Adguard.This certificate was signed by an untrusted issuer.Find the expired or revoked certificates and delete themĮxpired, invalid or revoked certificates usually have a red X sign, and they’re accompanied by one of the following alerts:.Choose the email account you want to delete on the left sidebar, and then click on the '-' button at the bottom. Click on Mail option at the upper menu, choose Preferences in the pull-down list. Open the LaunchPad and launch Keychain Access Method 1: Remove the email account from the Mail app.Here’s how to remove problematic certificates: If the SSL certificates are no longer valid or got deleted, the Mail app won’t be able to verify it. Fix 2 – Remove expired or revoked SSL certificates Hit the Turn off Firewall button to disable the firewall. ![]() Unlock the panel to make the necessary changes.Click on the Apple menu > go to System Preferences.You can re-enable it after you added your Google account to the Mail app. Your antivirus or firewall might be blocking certain Mail processes on your Mac preventing it from validating the server certificate.Īs a workaround, try turning off your antivirus and firewall. Fix Mac Mail failed to verify the server certificate Fix 1 – Disable your antivirus and firewall If your Mac’s Mail app could not verify the server certificate, this could indicate you’re not using the correct network or proxy settings, the SSL certificates expired or got revoked or you firewall is preventing you from using your email. If youre unable to use the Sign-in Helper to get into your account because your recovery info is wrong or inaccessible, you wont be able to regain access to your account again. This could be because of your network configuration or your proxy settings. Click on the email account required on the left sidebar, and then choose '-' button at the foot. Hit Mail option at the top menu followed by Preferences at the pull-down list. Many users reported they were unable to add or use a Gmail account on their Mac computers because the Mail app failed to verify the server certificate.Īnd this is the exact error message they received:įailed to verify the server certificate. Delete the email account from the Mail App.
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