Direct versus SMTP

AY Mail offers two modes of sending - direct and through a single SMTP server. Direct sending is nothing more than emulating SMTP server on your own computer. See Mail Transport for details.

[Professional and Corporate Editions Only] You can also relay your sending to AY Track which, in turn. can be configured to send either direct or through an SMTP server. Since AY Track is up all the time, this gives you certain advantages. Click here for details.

For most applications, we recommend using single SMTP server. This has the following benefits:

1. Once you transmit your mail to the SMTP server, the server will be sending it out. If some failures occur, it will try again and again. Since the real SMTP server is constantly connected to the Internet, it can try re-sending the failed messages at any time. As a result, you do not have to worry about failed recipients. If you send direct, you will have to re-send to the temporarily failed recipients several times over to make sure that all the addresses are covered.

[Professional and Corporate Editions Only] If you're sending through AY Track, the same process takes place. AY Track tries resending failed recipients every hour, so you do not have to worry about re-sending even if you configure AY Track to send direct.

2. Your mail will be sent from a regular SMTP server, so it is unlikely to be blocked at the destination. If you send direct, some of the destination servers will block your mail because they know your computer is not a regular SMTP server. It is especially true for home dial-up and DSL accounts, which are blocked at many destinations.

3. You can send non-personalized messages, which makes sending much faster.

There are situations when you cannot use an SMTP server:

1. Your service provider does not let you.

2. Your SMTP server limits you to 30 messages per hour, or has other limitations you cannot bypass.

Direct send also has its benefits:

1. You receive many fewer bounces . Since AY Mail is connecting to the destination servers directly, it will recognize 80% of undeliverable addresses right away.

2. Your recipients receive your messages as you send them. The SMTP server may delay mail delivery if it feels busy.

3. You can optimize performance by adjusting the number of threads.

There are situations when you cannot send direct:

1. Your service provider blocks your SMTP connections (port 25). If this happens, you will receive the Cannot Connect to the Server errors for all the recipients and they all will be marked as temporarily undeliverable. Several big Internet Service Providers do that.

2. Your service provider redirects all your SMTP connections to their own server. It may appear to you that you are sending direct, but in reality everything goes through the SMTP server of your provider.

3. Your DNS server does not provide MX records. This is a relatively rare condition.

You may find advantageous to use a combined method: First, you send everything using direct sending. Then you resend temporarily failed recipients through your SMTP server. This will reduce the number of bounces and will still give you the reliability of a regular SMTP server.

[Professional and Corporate Editions Only] If you send through AY Track, you can configure AY Track to use combined method - it will first try to send direct, but if this fails it will send through the server. Select Settings->AY Track from the main menu, then click on the Mail Sending button, select the Try direct, then switch to the external SMTP server option.

Alternatively, you can verify addresses before sending to minimize the number of bounces.

To select the way AY Mail sends messages, select Settings->Mail Sending from the main menu to open the Mail Sending Settings dialog.