Avira antivir version 8 (free version) protect against viruses from emails?

Does the software protect against viruses that are downloaded say, accidentally through yahoo mail or another account?

Avira antivir version 8 (free version) protect against viruses from emails?virus

It does not have a dedicted e-mail scanner, no. But free Avria does scan everything that gets written (downloaded) to your hard drive so in fact you are protected against e-mail malware.

Avira antivir version 8 (free version) protect against viruses from emails?anti virus

Regardless of whether it does or doesn't, it's a good idea to have a zero-day security program running too, e.g. Threatfire, which will trap malware between AV updates...
no, it does not come with an email scanner