Just the domain name, without www. This is a required field.
For example, in Archive.org format 20170501140502 or in short format 201705 (means till May 2017). If not set you get the latest available content.
The same format as with "To timestamp". If not set in very rare cases you can get some extra content from the ancient versions. We recommend to leave this empty.
It is important to use a working e-mail.