Hi, we are using Aspose.Email.DLL version 2.9.0 and get the error:
Thank you for writing to Aspose Support team.
It is always better to upgrade to latest version of the API as it includes new features, enhancements and bug fixes that were present in previous versions of the API. You can upgrade your Aspose.Total license for latest versions of all the Aspose APIs, but if you want to upgrade only Aspose.Email, you can also do that by subscribing to this individual product. For details about the API upgrade cost, please post your query in Aspose.Purchase forum to get further details from our business team.
Regarding your concern for Jan 2014 version of the API, please note that versions older than one year are not available as per company policy. If you have any technical query related to the API, please feel free to write to us.
PS: Our documentations section, Migration from earlier versions of the API, lists all the changes that you will be in need of once you upgrade from version 2.9.0 to the latest version of the API.