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Domainkeys and GPL
Posted February 15, 2005 – 12:33 pm by Yakov Shafranovich in Spam and EmailAndy mentions a rather interesting list message from Sam Varshavchik, the author of Courier (an open source MTA licensed under the GPL):
> I was wondering if (Yahoo”s) Domainkeys is considered to be implemented in Courier.
No. Yahoo has patent claims on Domainkeys, which are not licensed under GPL-compatible terms.
For the curious, the IPR terms for DomainKeys can be found here. The actual DK license is here. To me it is unclear what exactly the problem is but of course IANAL.
UPDATE: It seems that section 3.4 is one of the culprits being similar to the advertising clause in the original BSD license (see FSF writeup).
Tags: domainkeys, gpl, opensource, spam, yahoo —
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2 Responses to “Domainkeys and GPL”
IANAL, but my understanding is that NO OTHER LICENSE is compatible with the GPL.
By Grumpy on Feb 15, 2005
Grumpy: that is just not correct. LGPL, new-BSD, and many others are compatible. Look at the gnu.org web site listing various licenses.
By Anonymous on May 4, 2005