$recipients = "<user1@company.com>", "<group1@company.com>", "<group2@company.com>"

#below try/catch lines are just to make sure the list exists, you don't actually need it!
Add-PSSnapin Microsoft.SharePoint.PowerShell -EA 0
try
{
    $web = Get-SPWeb http://spwebapp1/sites/team
    $list = $web.GetListFromUrl("http://spwebapp1/sites/team/Lists/List1/AllItems.aspx")
    $fullUrl = $web.Site.Url + $list.DefaultViewUrl.Remove(0,1)
}
catch{
    Write-Host "it broke!"
return
}

#Or you could just set $fullUrl to a static string
$fullUrl = "http://spwebapp1/sites/team/Lists/List1/AllItems.aspx"

#And this sends out the mail to the specified SmtpServer
Send-MailMessage -From "sharepoint@company.com" -To $recipients -Subject "Happy Monday!" -BodyAsHtml "Here's a <a href='$($fullUrl)'>link!</a>" -SmtpServer mail.company.com