PayPal processing: Can I? What if?

[FONT=&quot]SCENERIO:[/FONT]


[FONT=&quot]I do not have IPN enabled at PayPal at this time. My PayPal account is Premier.[/FONT]


[FONT=&quot]I have a site www.myzencartsite1.com (ZenCart 1.3.7) and have processed 2 orders using PayPal. Order1 appeared to work fine. Order2 seemed fine, however it doesn’t appear in the list of New Orders. It doesn’t appear in the Pending, Processed, Delivered, and Update either. Customer1 and Customer2 along with order $$ amount is displayed @ www.myzencartsite1.com/admin/index.php in the New Orders list, but when you click on the Customer2 it only shows Order1 in the list. From looking through the forum think it is because Customer2 is not a registered PayPal user. I still received a notification of Credit Card payment received with details of Order2 from PayPal.[/FONT]


[FONT=&quot]I initially setup the PayPal processing to use my default PayPal email me AT myisp DOT com. I want to process orders for www.myzencartsite1.com using the email address sales AT myzencartsite1 DOT com so I added the new email to my PayPal account and proceeded to change the email in my ZenCart installation. I noticed that the Configuration instructions say to enable IPN at PayPal and to use the following configuration:[/FONT]


[FONT=&quot]Instant Payment Notification Preferences[/FONT][FONT=&quot] URL to: https://www.myzencartsite1.com/ipn_main_handler.php[/FONT]
[FONT=&quot]Website Payments Preferences[/FONT][FONT=&quot] set your Automatic Return URL to:
https://www.myzencartsite1.com/index...eckout_process[/FONT]



[FONT=&quot]QUESTIONS:[/FONT]


[FONT=&quot]Does sales AT myzencartsite1 DOT com have to be my default PayPal email?
[/FONT]


[FONT=&quot]Later I wish to create www.myzencarsite2.com then www.myzencartsite3.com, if I configure PayPal IPN as described above using the URLs & email for www.myzencartsite1.com will it affect my processing for www.myzencarsite2.com & www.myzencartsite3.com?[/FONT]


[FONT=&quot]Will it affect any Payment processing for other registered PayPal email addresses (same account) that I am currently using elsewhere? Such as those used for eBay, or subscription buttons, site using VirtueMart, etc.[/FONT]


[FONT=&quot]Since I do not have IPN set up at this time, what issues will I have if I do not enable it? The 2 orders that I received appeared to work fine.[/FONT]