The fast way to fix Avast Error Code 63
- Maria clark
- Apr 29, 2020
- 2 min read
Avast antivirus is the best name when it comes to securing your device against viruses and malware. This antivirus is known for securing your device and fights against unwanted bugs and threats available in the device. As said, nothing is designed perfectly so the same goes with Avast antivirus as it also comes with an error code 63 due to which it stops working on your device.
For fixing the invalid certificate issue:
First of all, launch Avast and click on Settings
Now, select the Active Protection tab
Click on Mail Shield’s customize option for showing the SSL Scanning window
Uncheck the Scan SSL connections and then, exit Avast
Some customers report that they have been capable to add IMAP servers to Not scan and it could also solve the issue

Alternative Solution
A postbox customer also shares the following:
First of all, export the Mail Shield certification from Avast Antivirus
Open the Avast user interface and click on the three-line menu and then, Settings
Choose the General from the left panel and then, click on Troubleshooting and open Old Settings
Choose Components from the left panel and after that click on customize that appears in the Mail Shield Panel
Choose SSL Scanning from the left panel and make sure that the box appears next to scan SSL connections is marked and then click on the Export certification
Choose a location to save the exported Mail Shield certificate and click on Save
After that, click on Ok appears in the Avast Information dialog
Now, import the Mail Shield certificate into the Post box
These above-given steps are the exact resolution of Avast Error code 63. If the issue still persists then call on Avast Helpline UK Service to get in touch with the technical experts for instant help regarding the resolution.
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