I have problems every time I try to fetch my imap gmail, with Thunderbird complaining that: "The certificate for imap.gmail.com:993 does not come from a trusted source".
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I have problems every time I try to fetch my imap gmail, with Thunderbird complaining that: "The certificate for imap.gmail.com:993 does not come from a trusted source".
As near as I can tell, imap.gmail.com:993 is still the recommended setting for
Version is Thunderbird 148.0.1 (64-bit). Adding an exception for the missing certificate does not seem to make a bit of difference.
I do not know if the use of Bitdefender as my security and vpn software is a factor. I notice that the certificate (exception certificate?) shown when I click on View Certificate in my gmail account settings appears to mention Bitdefender, so perhaps that's a factor. That certificate looks as follows:
Certificate
Subject Name
Common Name
imap.gmail.com
Issuer Name
Country
US
Organizational Unit
IDS
Organization
Bitdefender
Common Name
Untrusted Bitdefender CA
Validity
Not Before
Mon, 02 Feb 2026 08:37:57 GMT
Not After
Mon, 27 Apr 2026 08:37:56 GMT
Subject Alt Names
DNS Name
imap.gmail.com
Public Key Info
Algorithm
Elliptic Curve
Key Size
256
Public Value
04:2D:20:DA:19:33:1D:AC:28:91:52:02:EB:B8:7E:33:C0:B7:E4:F3:5E:4E:88:92:E5:7E:BB:30:0C:6C:E4:84:A8:3D:D7:49:9B:22:C8:C0:BB:01:80:4B:84:30:3A:3B:73:70:8F:AB:EB:C0:F0:D5:7B:8B:0B:64:1B:DC:76:67:41
Miscellaneous
Serial Number
1A:50:ED:15:50:A1:A7:93:5D:05:8A:CD:85:A5:15:FD
Signature Algorithm
ECDSA with SHA-256
Version
3
Download
PEM (cert)PEM (chain)
Fingerprints
SHA-256
12:8A:58:44:DF:B5:E1:E4:EF:CC:F7:35:09:BA:6E:88:86:16:15:78:F9:28:52:23:FC:0E:E9:69:D1:AF:21:86
SHA-1
A3:30:CB:65:39:51:46:9B:3B:BC:0B:B9:09:DD:26:40:A8:52:25:3D