Lua

Send Email to Distribution List

See more SMTP Examples

Sends the same email to a list of 1000 email addresses in 50 sends where each email has 20 recipients.

Note: Chilkat is not intended nor designed for mass emailing. A solution such as this might be used for a corporate emailing to employees, or an emailing to newsletter subscribers.

Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local mailman = chilkat.MailMan.new()

mailman.smtp_host = "smtp.mymailserver.com"
mailman.smtp_port = 465
mailman.smtp_ssl = true
mailman.smtp_username = "myUsername"
mailman.smtp_password = "myPassword"

-- Create a new email object
local email = chilkat.Email.new()
email.subject = "This is a test"
email.body = "This is a test"
email.from = "Senders Name <sender@example.com>"
email:add_to("Subscribers", "subscribers@example.com")

local bdMime = chilkat.BinData.new()
mailman:render_to_mime_bd(email, bdMime)

-- Load a file containing one email address per line.
local distList = chilkat.StringTable.new()
local success = distList:append_from_file(1000, "utf-8", "qa_data/distList.txt")
if not success then
    print(distList.last_error_text)
    return
end

local sbRecipients = chilkat.StringBuilder.new()

local i = 0
local szDistList = distList.count
local j = 0
while i < szDistList do
    -- Build a list of comma-separated recipients.
    if j > 0 then
        sbRecipients:append(",")
    end

    sbRecipients:append(distList:string_at(i))

    i = i + 1
    j = j + 1

    -- If we have 20 recipients, or we have the final recipient in the final chunk, then send.
    if (j == 20) or (i == szDistList) then
        success = mailman:send_mime_bd("sender@example.com", sbRecipients:get_as_string(), bdMime)
        if not success then
            print(mailman.last_error_text)
            return
        end

        j = 0
        sbRecipients:clear()
    end
end

success = mailman:close_smtp_connection()
if not success then
    print("Connection to SMTP server not closed cleanly.")
end

print("Email sent to distirbution list.")