Suspect trojan in email

I'm running AVG free 2015. I just received an email through Thunderbird which states:

RE: Voice message from 07773403290

The attached message was recently left in your voicemail account. We are sending you this email because you have asked for your messages to be forwarded to this address.

The original message is still in your account.

It has a zip file attached and I suspect it may contain a virus. This wasn't detected by AVG. Is there any way I can forward the email to AVG for analysis?
 

Hello Alan. If you come across an application or file that you believe is infected but it is not detected by AVG, you can submit it to us for analysis by clicking this link http://www.avg.com/submit-sample . Thank you. Kishore, AVG Customer Care.

Hello Alan. If you come across an application or file that you believe is infected but it is not detected by AVG, you can submit it to us for analysis by clicking this link http://www.avg.com/submit-sample . Thank you. Kishore, AVG Customer Care.