PowerShell Send Email - email

Question

See this question's first two answers (have tried both, both generate the below error):
Code (changed necessary pieces):
$EmailFrom = "notifications#somedomain.com"
$EmailTo = "me#earth.com"
$Subject = "Notification from XYZ"
$Body = "this is a notification from XYZ Notifications.."
$SMTPServer = "smtp.gmail.com"
$SMTPClient = New-Object Net.Mail.SmtpClient($SmtpServer, 587)
$SMTPClient.EnableSsl = $true
$SMTPClient.Credentials = New-Object System.Net.NetworkCredential("username", "password");
$SMTPClient.Send($EmailFrom, $EmailTo, $Subject, $Body)
Other way (changed necessary pieces):
$credentials = new-object Management.Automation.PSCredential “mailserver#yourcompany.com”, (“password” | ConvertTo-SecureString -AsPlainText -Force)
Send-MailMessage -From $From -To $To -Body $Body $Body -SmtpServer {$smtpServer URI} -Credential $credentials -Verbose -UseSsl
I'm getting this error:
The SMTP server requires a secure connection or the client was not
authenticated. The server response was: 5.5.1 Authentication Required.
Learn more at
On the first script, the port is explicitly specified, while it's not using PS's built in function (though I haven't had problems with this function in the past).
Thanks!

Answer 1

We send mail with Powershell through Office365. This is what we use (works perfectly). Remember that the user you authenticate with must have "send as"-permissions of the from-address:
$PSEmailServer = "smtp.office365.com"
$credentials = new-object Management.Automation.PSCredential “UserLogonName#domain.com”, (“password” | ConvertTo-SecureString -AsPlainText -Force)
$enc = New-Object System.Text.utf8encoding
$from = "FromAddress"
$to = "ToAddress","ToAdress2"
$body = "Test"
$subject = "Test"
Send-MailMessage -port 587 -From $from -BodyAsHtml -Encoding $enc -To $to -Subject $subject -Body $body -UseSsl -Credential $credentials

Answer 2

Try this function to send an email via Gmail:
Function batchsend-mailmessage ($to, $subject, $body, $attachments)
{
$smtpServer = "smtp.gmail.com"
$smtpServerport = "587"
$emailSmtpUser = "TheBatch#gmail.com"
$emailSmtpPass = "PasswordOfTheBatch"
$emailMessage = New-Object System.Net.Mail.MailMessage
$emailMessage.From = $emailSmtpUser
foreach ($addr in $to)
{
$emailMessage.To.Add($addr)
}
foreach ($attachment in $attachments)
{
$emailMessage.Attachments.Add($attachment)
}
$emailMessage.Subject = $subject
$emailMessage.IsBodyHtml = $true
$emailMessage.Body = $body
$smtpClient = New-Object System.Net.Mail.SmtpClient($smtpServer , $smtpServerport)
$smtpClient.EnableSsl = $true
$smtpClient.Credentials = New-Object System.Net.NetworkCredential($emailSmtpUser , $emailSmtpPass);
$SMTPClient.Send( $emailMessage )
}
Like this :
batchsend-mailmessage -to $DesAdressesDest -subject $Subject -body $body -attachments $xlsFile