libMailer.ps1

function New-EmailTemplate {
    param(
        [Parameter(Mandatory=$true)]
        [Alias('To')]
        [String] $toField,

        [Alias('Subject')]
        [String] $subjectField,

        [Parameter(Mandatory=$true)]
        [Alias('Body')]
        [String] $emailBody,

        [Alias('Attachment')]
        [System.Net.Mail.Attachment] $emailAttachment,

        [Alias('Bcc')]
        [String] $bccField,        

        [Alias('BodyAsHtml')]
        [Switch] $isBodyHtml,

        [Alias('From')]
        [String] $fromField
    )

    $message = New-Object Net.Mail.MailMessage

    if ($isBodyHtml) {
        $message.IsBodyHtml = $true
    }
    
    $message.To.Add($toField)
    $message.Subject = $subjectField
    $message.Body = $emailBody
    $message.From = $fromField
    $message.ReplyTo = $fromField

    if (-not($emailAttachment -eq $null)) {
        $message.Attachments.Add($emailAttachment)
    }

    if (-not([String]::IsNullOrWhiteSpace($bccField))) {
        $message.Bcc.Add($bccField)
    }

    return $message
}


function New-InlineAttachment {
    param(
        [Parameter(Mandatory=$true)]
        [Alias('Path')]
        [String] $filePath,

        [Parameter(Mandatory=$true)]
        [Alias('MediaType')]
        [String] $attachmentMediaType
    )
    
    $attachment = Get-ChildItem $filePath

    $mailAttachment = New-Object System.Net.Mail.Attachment -ArgumentList $filePath

    $mailAttachment.ContentDisposition.Inline = $True
    $mailAttachment.ContentDisposition.DispositionType = 'Inline'
    $mailAttachment.ContentType.MediaType = $attachmentMediaType
    $mailAttachment.ContentId = $attachment.Name

    return $mailAttachment
}


function Send-Email {
    param(
        [Parameter(Mandatory=$true)]
        [Alias('SmtpServer')]
        [String] $mailServer,

        [Parameter(Mandatory=$true)]
        [Alias('Email')]
        [Net.Mail.MailMessage] $mailMessage
    )

    $smtp = New-Object Net.Mail.SmtpClient($mailServer)
    $smtp.Send($mailMessage)
}