$Env:ComputerName doesnt work with powershell Send-MailMessage in batch file - powershell

Question

After a lot of errors and edits I got the Send-MailMessage to work through a command prompt. Below iteration sends out the emails perfect.
powershell Send-MailMessage -From " `<user#domain>`" -To " `<user#domain.com>`" -Subject 'Some subject goes here' -Body 'Some body with alert regarding Host: $env:computername. List of deleted files is attached.' -Attachments 'C:\somefile.txt' -Priority High -dno onSuccess, onFailure -SmtpServer 'smtp.domain.com'
However, this does not fetch the computername in the body. I have tried running this command in powershell directly and it works with the computername variable in body.
To get it to simply send out mails, I have already tried doing
powershell -command "command" or powershell -command "{command} or
powershell -command "& {command}" and so on and it doesnt even send
out emails.
As I am now successful sending out emails, I need to have the Computername inside the body text.

Answer 1

Use double quotes around the argument value to have variables contained expanded.
I.e.:
-Body "Some body with alert regarding Host: **$env:computername**. ..."
Relevant reading.

Answer 2

Your command line in the question and your own answer relies on the fact that powershell currently has the default (position 0) argument -Command,
but as this changes from PowerShell 6.0.0beta3 on to -File
you should explicitly use at least -C as the shortest
abbreviviation for -Command.
to speed up execution I'd use the additionl parameters -NoProfile or short -NoP and -NonInteractive or -NonI
to stop cmd from trying to interpret any parameters/arguments you should double quote them all - and escape any necessary inner double quotes with a backslash \" while also replacing double quotes with single ones if ever possible.
So I'd suggest:
powershell -NoP -NonI -C "Send-MailMessage -From \"SomeWeb-Prod#domain.com\" -To \"fromuser#domain.com\" -Subject 'Some notification for SomeWeb-Prod' -Body 'Some Alert for Host: %computername% with IP: %NetworkIP% at %time%. details in attached file.' -Attachments 'C:\somefile.txt' -Priority High -dno onFailure -SmtpServer 'smtp.domain.com'"
Or, (as you partly discovered yourself):
powershell -NoP -NonI -C "Send-MailMessage -From 'SomeWeb-Prod#domain.com' -To 'fromuser#domain.com' -Subject 'Some notification for SomeWeb-Prod' -Body 'Some Alert for Host: %computername% with IP: %NetworkIP% at %time%. details in attached file.' -Attachments 'C:\somefile.txt' -Priority High -dno onFailure -SmtpServer 'smtp.domain.com'"

Answer 3

"$env:computername" doesnot work for me. It simply prints it as $env:computername
%computername% worked.
Here's what's working for me right now.
powershell Send-MailMessage -From " `<user#domain.com>`" -To " `<user#domain.com>`" -Subject 'Some subject goes here' -Body 'Some body with alert regarding Host: %computername%. Some file is attached.' -Attachments 'C:\somefile.txt' -Priority High -dno onSuccess, onFailure -SmtpServer 'smtp.domain.com'
Update:
The above command worked on Win7 fine, but gave errors on server 2012. Finally this is what worked on win 2012
powershell "Send-MailMessage -From "SomeWeb-Prod#domain.com" -To "fromuser#domain.com" -Subject 'Some notification for SomeWeb-Prod' -Body 'Some Alert for Host: %computername% with IP: %NetworkIP% at %time%. details in attached file.' -Attachments 'C:\somefile.txt' -Priority High -dno onFailure -SmtpServer 'smtp.domain.com'"

Answer 4

It works for me, by using double quotes around variables.
I am using batch script to call powershell Send-MailMessage
Batch Script:send_email.bat
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -windowstyle hidden -command 'E:\path\send_email.ps1
Pwershell Script send_email.ps1
Send-MailMessage -From "noreply#$env:computername" -To '<target_email#example.com>' -Subject 'Blah Blah' -SmtpServer 'smtp.domain.com' -Attachments 'E:\path\file.log' -BODY "Blah Blah on Host: $env:computername "