October 9, 2013 – Dan Langille's Other Diary

Postfix client certificate verification

I decided to set up some of my mail servers to require certification authentication on the submission port (587). In my case, I want to forward mail from my server at home to my public servers out there on the Internet. I don’t want just anyone to be able to submit mail here, so the […]

mail.app on Apple OSX and IOS fail when connecting to 4096-bit StartCOM certificates

Leave a Comment / Security / By Dan Langille / October 9, 2013

NOTE: this post title is inaccurate. It was not until later that I discovered the problem was related to 4908-bit certs, not 4096-bit certs. I appear to have found a bug with OSX and iOS. Neither one can handle a 4096-bit certificate by StartCom. Changing to a 2048-bit cert allowed the connection. I have not

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