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This Page 2 >Benefits of using a PCs as a 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

 
 
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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 2.0/3.0 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.

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

 
 

 

 

 

 

 

 

 

 

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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

 
 
 

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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/check 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. See: How Email Works or Basic Email Delivery

 

This Page 2>Benefits of using a PCs mail server

Page 1 > Postcast Mail Server Freeware
PostCast Server is an SMTP mail server program that completely replaces your ISP's SMTP server and by making one small change in your e-mail program, you can start sending messages directly from your computer.

Setting up your PostCast mail server program
will only take minutes....
Page 1>>
This is how to do it...

 


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