Invalid root certificate message for fastmail.fm IMAP in The Bat!

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Offline Anne

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This is one of those irritations which can arise suddenly, and then finding how to fix it can take a while, so here's the fix!

If you use a fastmail.fm email address and access it via IMAP in The Bat! and get a popup message saying the security certificate is invalid, go to this page in your browser: http://blog.fastmail.fm/2011/09/02/updated-ssl-certificate-for-messagingnengine-com/ and download the two cert files shown: https://www.fastmail.fm/certs/DigiCertHighAssuranceEVRootCA.crt and https://www.fastmail.fm/certs/DigiCertHighAssuranceCA-3.crt - save them somewhere handy to find.

Now go to The Bat! and select the fastmail.fm email account, and right click the account name and select Properties > General > Edit Personal Certificates

Click the Certificates tab and then the Import button. Browse to where the downloads certificates you've just saved are and select them both.  Once they are imported you'll see them in the Certificates pane. Highlight each one in turn and click View and then open the Certification Path tab. Click the Add to Trusted button, and this will import the new certificate into your Certificate address book.  Click OK to close each pane (there'll be three to work back through.)

Now your fastmail.fm account should connect again without that annoying popup message!  8)
Cheers!
Anne


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Offline Mad-Batter

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Re: Invalid root certificate message for fastmail.fm IMAP in The Bat!
« Reply #1 on: November 16, 2014, 07:04:50 PM »
This is one of those irritations which can arise suddenly, and then finding how to fix it can take a while, so here's the fix!

If you use a fastmail.fm email address and access it via IMAP in The Bat! and get a popup message saying the security certificate is invalid, go to this page in your browser: http://blog.fastmail.fm/2011/09/02/updated-ssl-certificate-for-messagingnengine-com/ and download the two cert files shown: https://www.fastmail.fm/certs/DigiCertHighAssuranceEVRootCA.crt and https://www.fastmail.fm/certs/DigiCertHighAssuranceCA-3.crt - save them somewhere handy to find.


This seems to be close to getting at the problem I'm having (please see my thread about pulling messages).

Is there a way to find out what the certificates are that I need (if I need them)
and where to find them?
TIA

 

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