Undelivered
 Table of Contents
Alternative SMTP Gateways
This option allows you to specify one or more backup SMTP servers. If
PostCast Server is unable to deliver a message, it can forward it to a
backup SMTP server. This enables the program to successfully send higher
percentage of messages. If only certain domains are unable to receive
messages from PostCast Server, you can use this option to forward those
messages to your ISP's SMTP server. Some ISPs (AOL, for example) block
access to their servers if the incoming connections originate from dynamic
(dial-up) IP addresses. This option enables you to forward all messages
for those servers to your ISP's SMTP server. Their server's (non-dynamic)
IP address will be the source of your outgoing messages. For more information,
see this page.
Create a list of invalid e-mail addresses
This option enables you to create a list of bad addresses. When the
program cannot deliver a message to an e-mail address, it can enter that
address in an Access database file or a text file. The list will contain
all e-mail addresses that posed a problem for the program. You can use
the list to filter your mailing lists and avoid sending messages to those
addresses in the future.
If you activate the "Use Access 97 database" option, the program logs
all bad e-mail addresses to the Access database. It requires the location
of an existing .mdb database file. If the database has been successfully
loaded, you can choose the table and the table column where you want to
store all bad e-mail addresses.
If it is more convenient, you can enter e-mail addresses in a text file
where each address will be written in a separate line. It is necessary
to enter the location of the file where you want the program to put bad
e-mail addresses. If the file already exists and already contains some
text, it will not be deleted. The program will simply add bad addresses
to the list.
How does the program determine which e-mail address
is bad?
Whether an address is bad depends on how the "Administration" part of
the "Settings" window has been defined. The program will not automatically
mark an address as bad just because it did not manage to deliver a message.
Before the address is considered invalid, the program checks the remote
server response and the error message that occurred during sending. The
address is invalid if the domain does not exist or if the server responded
with the message like 'user unknown'. |