Without a valid IP address of your computer,
mail server will send the 550 access denied
error to the email client...
 

Postcast Mail Server Freeware

 


100% effective.
I recommend it.

  The easies way to stop email spam, virus getting
into your PC
Free
2-Try

Download your Free PostCast Mail Server program
http://www.basenow.com/pub/postcastserver.zip
or here...
ftp://ftp.postcastserver.com/postcastserver.zip
File size is 14 Mb for Win95,98,XP,ME,NT,2000

The PostCast PC stand alone mail server program will allow you to broadcast up to 15,000 emails per hour (5 kb text email messages with a 56.6 dial-up line) or more than 15,000 with a DSL/ADSL connection from your PC without having to go through any restrictions imposed by your ISP mail server.

Setting up your PostCast mail
server program will only take a minutes....


This is how to do it...
>Start-up postcast, >click tools, >settings >System Tab and
"tick"--Manually (this way; manually, you need to press PostCast Start Button every time you want PostCast to send emails and when PostCast is done with sending--it will auto stop and you will need to press the "Start button" again if you want it send again.
OK, done, just leave everything else at default.

How does it work?
Basically, your email Mailsbroadcast freeware program will deliver email messages to the PostCast mail server program within your PC and when you click....

...The PostCast "Start" button (you need to be online--will work with a dial-up account or broadband always -on account), all emails will be sent directly from PostCast to your recipients ISP mailserver mailbox thereby bypassing your ISP mail server as well as any limitations imposed by them--in other words, your PC is the mail server.

Notes:
You will notice that some emails in the PostCast will remain undelivered--it is due to various reasons like; invalid email address (dead email address) or the mail server is busy (timeouts), errors like 550 etc. It is quite normal and you may need to click PostCast Start button to try delivering them again or configure PostCast to run automatically and try to deliver them over a 24 hours time frame making at least 20 attempts before considering any unsent emails as dead ones.

Notes:
You will notice that some email address will always be rejected by some ISP mail servers for example; hotmail. To send emails to those ISP mail servers... read more

 

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Freeware


How to send mail from your
MailsBroadcast program to the "PostCast" program?

After installing your PostCast mailserver freeware, this is how you setup your "MailsBroadcast" program to send email message from your PCs and by-pass your ISPs mail server.

Step 1 - Start-up the PostCast program...
then
Start-up your Mailsbroadcast program....
and
at the Broadcast Manager menu select...
A.
Create a Broadcast Delivery Account
B.
Enter a name
any name, this name is for your reference purpose only, it has
neither relationship nor any technical effect to the sending of emails and that your email recipients will not get to see this name.
Next

C.
From: enter a valid email address
this is the email address that your message will be returned (bounced) to, in the even that your message is unable to be delivered i.e. recipient mailbox full, etc.

Important: Most ISP will not allow you to send email using an email address from an ISP-1 account and then login using another ISP-2 account. It is recommended to use an email address from ISP-1 together with an ISP-1 login account to broadcast your email.

D. Reply To: enter a valid email address
any valid email address, this is the address that the recipient to your broadcast message shall reply to when they click "reply".

Next

E.
Enter the name of your outgoing SMTP mail server
You may enter localhost or 127.0.0.1

F. Requires authentication - Do not "check" tick this box
User Name: and Password: is not required because you will be broadcasting your email messages directly to your recipients mail servers mailbox and bypassing your own ISP mail server.

Next

G.
Tick "check" the box send with no time delay

OK,
you are done with the setup of your mailsbroadcast program delivery account.

Step 2
At the Broadcast Manager Menu

Select and click on "Broadcast Manager" to display the "Broadcast Manager" dialog box.
Next
Point your mouse at the "Email List" bar and right click to "Add a list for broadcasting".
Next
Point your mouse at "Message" bar and right click to "Add a message for broadcasting" and select a broadcast delivery account and click the "Back Button".
Next
Your prepared message will be displayed and you may fill in any thing you wish at the; From: To: and Subject: line
Click OK
Next
You are all set to start broadcasting your email message...
(a) Make sure your PostCast mail server program is running
(b) Point your mouse at the message bar and Right Click, select "Send this message"....
(c) A broadcast dialog box will be displayed...
click "SEND" and your message will be delivered to your PostCast mailserver program...
Next
Go to your PostCast program and click on the "Send" button....
all your message will be delivered directly to all the email addresses recipients ISP mailserver mailbox. For it to work, make sure you are connected to the internet (will work on a dial-up or any online account).

Benefits of using a PCs mail server

By using your PCs as a mail server, you can send unlimited email messages without restrictions--because most ISPs limit user access to their mail server by time or the quantity of emails that can be sent.

When you are using your PCs as a mail server, the email will be sent directly to your recipient's mailbox via their ISP mail server and bypass your ISPs mail server delivery queue.

Single thread mail server can send between 500 to 5,000 or more text emails per hour with a 56Kbps V92 or ISDN modem--depending on your Internet connection bandwidth or throughput and the mail server. *single-thread, means that emails are sent-out one after another--after the recipient mail server have accepted each email sent--the program will then proceed to send the next email (if it is not accepted, it will be kept in queue to be resend later).

**Multiple thread mail server programs (send multiple emails simultaneously to recipients ISPs mail server). They can send very large volume of emails (250,000 text mails) through Broadband system like: DSL 256/516kbps, ADSL 12/480 Mbps, or Network/Cable T1 (1.544Mbps) Internet connection using powerful high performance dedicated mail server.

Note: Different ISPs provide different up-load and download speed--meaning that having a 256/512Kbps DSL or 480Mbps USB 2.0 High Speed or Full Speed 12 Mbps 2.0 USB ADSL download does not mean that you can up-load at the same speed, check it up with your ISPs. It also depends on whether your motherboard support USB 2.0 (1.1 device) Full Speed device or the USB 2.0 High Speed--meaning that if you have a ADSL 2.0 USB Full Speed Modem running on USB 1.1 then you only get 12 Mbps

Emailing speed can be as slow as 500 or 5,000 text message per hour (depending on message size) using a 56K or ISDN, DSL at the lower end and for ADSL, Network/Cable T1 (1.544Mbps) connection, may even send up-to 250,000 emails per hour--depending on the Internet connection throughput and computer mail server system capability.

How does your email gets to the recipient?
See: How email works?

 

Additional info about the PostCast mailserver program

PostCast mail server "log files"
The log files allow you to find more information about any problems related to sending out mails. Press Settings, click Administration tab and you can work with the server logs in the 'Log files' section. First, try to deliver the messages from the server and then open the latest log file from the list.

PostCast mail server "DNS server" problems
If the PostCast Server is unable to send a message, it is, in most cases, due to input of "incorrect" DNS server address. In order to enter the address in the PostCast Server, click on the 'Settings' button at the main toolbar.

It is suggested that you select the 'Use default DNS address' option in the Settings that will allow the program to use several public DNS servers even if have not entered any address in the text box.

PostCast mail server "DNS Timeout errors"
If you constantly receive 'DNS Timeout' errors, choose the 'Use this DNS Server' option in the Settings screen and enter the IP address of your ISP's DNS server.

550 access denied error
The Allow access ONLY for users with these IP addresses option in the Security section of the Settings window will allow access only to those users from the Internet or LAN whose IP addresses have been entered.

If you did not include a valid IP address of your computer, the server will send the '550 access denied' error to the e-mail client. Solution for this is to add your correct Internet and/or LAN IP address to the list. Another approach is to open the Settings window and in the Security section delete all entries from the 'Allow access...' list.

If the transaction beginning HELO command argument is not acceptable a 501 failure reply must be returned. If the commands in a transaction are out of order a 503 failure reply must be returned. (Command - a request for mail service action sent by the sender SMTP to the receiver SMTP) Post Office Protocol

PostCast mail server notes:
You will notice that some email address in your PostCast program will always be rejected by some ISP mail servers for example; hotmail.

To send emails to ISP mail servers that barred your PostCast program from sending to them... you will need to tweak PostCast by going to >"Settings", >Advance Tab, >Server identity for HELO handshaking command "Settings button", Tick Use this identification: (what's this????) it is the IP address of your ISP mail server for hotmail to identify that it is coming from your ISP mail server instead of your PC IP 127.0.0.1

How do you get your ISP mail server IP??? Simply, send yourself a test message from your mail client (outlook/Express) to your regular ISP email account and then check mail. Then... right click on the message, select "Properties" and "Details" and you will find something like this...
Received: from quasariehyperdrivedns.com ([200.10.230.200]) by dr249.registrare.com.ru with MailEnable ESMTP; Fri, 01 Dec 2006 13:28:32 +0800
Received: from [219.95.62.118] (port=2729 helo=DELL700M)
by quasariehyperdrivedns.com with esmtpa (Exim 4.52)
id 1Gq0xC-0004ih-Vi for youremail@youremaildomain.com; Fri, 01 Dec 2006 00:29:05 -0500
Obviously if your ISP is quasariehyperdrivedns.com then the IP will be: 200.10.230.200

LAN connection and Proxy servers PostCast Server cannot work over a LAN. If you connect to the Internet over the local area network (LAN) and want to use PostCast Server, you have to install PostCast Server on a computer that is directly connected to the Internet.

The PostCast mail server program "Allow Relay" box!
You must check this option if you are planning to send messages outside of your network. 

If you have this Allow Relay option enabled, and if your server is accessible from the outside World called open relay, then anyone on the Internet, potentially, will also be able to use your server for sending mail and your email domain will be blacklisted.  You may want to protect your server from an unauthorized use by enabling SMTP authentication.
SMTP
Simple Mail Transport Protocol a protocol governing email transmission and reception (sending and receiving emails between mail servers).

PostCast mail server Ports and firewall settings
The program connects to remote ports 53 and 25. If you are using firewall, allow outgoing traffic for that ports and you will probably be able to use the program.

ICMP and firewall settings Internet Control Message Protocol (ICMP) is used in the DNS component. The component periodically pings DNS servers to find the one with the fastest response. You should enable ICMP in your firewall program.

Mail Servers FAQs If you are using your own mail server program to send emails the most common problems for undeliverable mails are identified here and it will solve most of your problems.

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