>Hi All
>
>I have need to verify (zip + 4...) all my addresses (8000 and growing) in my database so I can use USPS bulk mail. Does anyone have some experience with software and an update service for doing this?
>
>Thanks

There is simple algorhitm for this:

1) Do not allow any space characters or any of the following characters:
>
<
(
)
` apostrophe
! 
$
%
, comma
\
" double quote
; semicolon
: colon
[
]

2) Do not allow the character string before the @ to begin or end with one or more periods. However it is ok for this string to contain periods.
3) Do not allow the character string before the @ to begin with one or more hyphens. However it is ok for this string to contain and end with hyphens.
4) Do not allow more than one “@” character.
5) Only allow between 1 and 63 valid characters is before the “@”.
6) Note that this means that before the @ sign the alphabet, numbers and the following special characters are ok:
~ tilde
#
^
&
*
_ underscore
+
=
?
/
' single quote
| pipe
{
}

7) After the @ sign, only allow the alphabet, numbers, hyphens, and periods.
8) The character following the @ sign must not be a period or a hyphen.
9) After the @ sign, at least one character must be between any two periods.
10) After the @ sign, the second-level domain name (the characters to the left of the last period on the right back to the @ sign or back to a period) must be at least 2 but not more than 63 characters (letters, numbers, and hyphens [but neither the first nor last can be a hyphen]).
11) After the @ sign and after the last period on the right, there must be at least 2 but not more than 6 letters.

You can create alone VFP class which will validata that either during input or during sending. Bulk emailing with CC or BCC is not good choice because antispam software block it. It will be good to crete sending email by email
HTH