Cause of a Powershell Scripting Error for sending email with attachment

you have to share your script Plus what command you are using
plus check smtp port is open or not

Check the SMTP server address: is it correct?is Port 25 reachable from where the script is running? As Tahir advised, provide more details.

The port is open, since I am able to use the following script however it's successful only when I use it without the attachment.


$username = 'email1@gmail.com'
$password = 'password'
$sendMailArgs = @{
      To =                  'email2@gmail.com'
      From =                  $username
      Cc =                  'email3@gmail.com'
    Bcc =           'email1@hotmail.com'
      Subject =            'File as Attached'
      Body =                  'The file is attached'
      Attachments =      'C:\Users\User1\Desktop\Folder\File.pdf'
      SmtpServer =      'smtp.gmail.com'
      Port =                  587
      UseSsl =            $true
      Credential =      New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $username, (ConvertTo-SecureString $password -AsPlaintext -Force)
}
Send-MailMessage @sendMailArgs
Write-Host "Mail Sent"

Outlook works fine.
And I even renamed the attachment and it still did not work.

I've done it 2 ways:

$username = 'jortega928@gmail.com'
$password = 'xxx'
 

$smtp = new-object Net.Mail.SmtpClient('smtp.gmail.com') 
$smtp.EnableSsl = $true 
$msg = new-object Net.Mail.MailMessage  

$msg.From = $username
$msg.To.Add("jortega@faboit.com") 
$msg.BodyEncoding = [system.Text.Encoding]::Unicode 
$msg.SubjectEncoding = [system.Text.Encoding]::Unicode 
$msg.IsBodyHTML = $true  
$msg.Subject = "File is Attached" 
$msg.Body = "The file is attached"
$msg.Attachments.Add("Z:\WORKING_DIR\file1.csv")

try{
$SMTP.Credentials = New-Object System.Net.NetworkCredential("$username", "$password"); 
$smtp.Send($msg)
}
catch{
    $er = $_.Exception.Message
    Write-Error $_.Exception.Message
}

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(Other way):

try{
    $From = "jortega928@gmail.com"
    $To = "jortega@faboit.com"
    $Cc = "ceo@faboit.com"
    $Attachment = "Z:\WORKING_DIR\file1.csv"
    $Subject = "Email Subject"
    $Body = "Insert body text here"
    $SMTPServer = "smtp.gmail.com"
    $SMTPPort = "587"
    Send-MailMessage -From $From -to $To -Cc $Cc -Subject $Subject `
    -Body $Body -SmtpServer $SMTPServer -port $SMTPPort -UseSsl `
    -Credential (Get-Credential -UserName $From -Message "Insert the password for $From") -Attachments $Attachment
}
catch{
    Write-Error $_.Exception.Message
}

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I get the following "The SMTP server requires a secure connection or the client was not authenticated.
error 5.5.1 (Authentication required).


This is because I have disabled this  (Less secure app) when I enabled it works.
https://myaccount.google.com/lesssecureapps

If you ask me I'd use the second since I wouldn't need to hardcode my password on the script ;)

The smtp server was rejecting.