function SendEmail {param ($SmtpServer = 'smtp.office365.com', # This is the address of the Office 365 SMTP server we will be using.$SmtpPort = '587', #This is the Port of the Office 365 SMTP server we will be using.$SmtpUser = 'taoXXX@hotmail.com', # Specify your Office 365 User ID#$SmtpPassword = '', # Specify your Office 365 password, but not secure, more information belower $SmtpSecureFile = 'secure.file', # Specify your password secure.file, more secure$MailFrom = 'taoXXX@hotmail.com', # Specify the Source Email ID[Parameter(Mandatory=$true)]$MailTo, # Specify the users to which the mails should be sent. $MailTo = 't-shtao@microsoft.com'[Parameter(Mandatory=$true)]$MailSubject, # This is the Mail Subject line. $MailSubject = "powershell send Email by t-shtao"$MailBody, # This is the Mail body. $MailBody = "Hello <span style='font-weight:bold;'>Microsoft</span>.",$MailAttachments # This is the Mail attachments' file path. $MailAttachments = "C:\PBID-qs\attachments\attachment01.txt"
    )# get Email secure password by [SecureString][String]$SmtpPassword = SecurefileToString -SecureFile $SmtpSecureFile# make credentials by Email secure password$Credentials = New-Object System.Management.Automation.PSCredential -ArgumentList $SmtpUser, $($smtpPassword | ConvertTo-SecureString -AsPlainText -Force) # MailParameters setting$MailParameters = @{Subject=$MailSubjectFrom=$MailFromTo=$MailToSmtpServer=$SmtpServerPort=$SmtpPortUseSsl=$trueCredential=$CredentialsBodyAsHtml=$true}# add html bodyif ($MailBody) { $MailParameters.Add('Body',$MailBody) }# add attachmentsif ($MailAttachments) { $MailParameters.Add('Attachments',$MailAttachments) }# send EmailSend-MailMessage @MailParameters# send successfully. Write some informationWrite-Host "Send Successfully. SmtpServer:$SmtpServer, From:$MailFrom, To:$MailTo"
}function StringToSecurefile {# [string]password convert to secure.fileparam ($OrdinaryString, # the string need secure$SecureFile = 'secure.file' # storeage of secure string
    )# string convert to file$OrdinaryString | ConvertTo-SecureString -AsPlainText -Force | ConvertFrom-SecureString | Out-File -FilePath $SecureFileWrite-Host "password has converted to $SecureFile"
}function SecurefileToString {# secure.file convert to [string]passwordparam ($SecureFile = 'secure.file' # storeage of secure string
    )# file convert to secure string$secureString = Get-Content -Path $SecureFile | ConvertTo-SecureString$ptr = [System.Runtime.InteropServices.Marshal]::SecureStringToGlobalAllocUnicode($secureString)$OrdinaryString = [System.Runtime.InteropServices.Marshal]::PtrToStringUni($ptr) Write-Host "password has read"return $OrdinaryString
}# make password's secure.file by visible password string. run only first
# StringToSecurefile -OrdinaryString "password" -SecureFile "secure.file"# send Email, [Mandatoty]MailTo, [Mandatory]MailSubject, MailBody, MailAttachments
SendEmail -MailTo "tXXX@microsoft.com" -MailSubject "powershell send Email" `-MailBody "Hello <span style='font-weight:bold;'>Microsoft</span>." `-MailAttachments "C:\PBID-qs\attachments\attachment01.txt"