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I had to find a mail server software I could use with my C# code. I found the following potential software after a quick search. 1. Exchange Server 2. hMail Server 3. MailEnable 4. SendMail 5. Windows POP3 Service (didn't have high hopes on this one, but you never know) Since I didn't have enough time to research this list more closely, please take my conclusion with a pound of salt! Based on my quick research I found that hmail and send mail didn't have an API I could use with C# and I think MailEnable had C# API available for paid versions (or it could be SendMail). When I started to install Exchange Server I quickly found out I will need an AD without which I would not be able install it. While installing Exchange server I decided to give Windows POP3 server a try and sent out an email to my personal email addresses using for example austinpowers@groovybaby.com (say www.groovybaby.com is my department's domain). I received the emails which I expected to work. Now the real tes... [More]

Problem: As stated in the previous article I had to write code to send bulk emails with a 6MB PDF attachments individually. The source of the email body was from a .htm template file which had references to images such as the company logo and others. This email should also have an alternate plain text format in case the recipient's email client accepted only plain text email. Solution: The code is pretty simple and straight forward. We will be using the following classes from .NET MailMessage, EmbeddedMailObject, MailDefinition, MailAttachment and SMTPClient. C# Code using System.IO; using System.Net; using System.Net.Mail; using System.Web.UI.WebControls; namespace Mail_CA01 { class Mail { // folder where this console application will reside public static string directory = @"C:\SendMail"; public static void SendMail() { try { // read all the email addresses stored in this text f... [More]

At a short notice I had to use C# to send out bulk emails to a few thousand recipients. Of course short notice is not the problem of the problem. To keep things interesting I couldn't use our company's Exchange Server and the domain email address, which would have been straight forward. All I would have to do is write code to send emails through this server. But that was not going to happen. I had to use our department's domain name which is different from the company and there were no email servers setup nor were there any email addresses created for this domain. So the problem is four fold. 1. Write C# code to send individual html formatted emails with a plain text option, from a html template file with images in the email and a 6MB PDF attachment to boot. 2. Setup a server and find viable mail server software to create email addresses, send and receive emails for the domain in question. 3. Set up the DNS entries including the MX records and SPF record to avoid the emails being re... [More]