There are a few ways to test to see if your affiliates are receiving your messages; none are absolutely 100% as to assuring this.
1) Team-mails always make it to the affiliate's account, but if they don't log in, they don't get your messages. You can check their log-in dates, but logging in doesn't guarantee them actually *reading* those messages.
2) You can request a return-receipt on regular e-mails, but some domains don't acknowledge those requests, and an affiliate can usually choose *not* to send one if they so desire.
3) Similarly, some e-mail clients will allow you to tract a delivery status notification, but again, many domains choose not to send those.
4) You can send an "incentive message," offering free T-Credits or a gift certificate if they respond. This has the added bonus of encouraging a little bit of activity on their part, and if they do not answer, either (a) they are not receiving your messages or (b) they have lost interest and you can consider them effectively inactive.
The most important thing to do is to concentrate on those that do show some desire. Apathy and attrition are all over the internet, and it's important not to let either affect you.
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There are a few ways to test to see if your affiliates are receiving your messages; none are absolutely 100% as to assuring this.
1) Team-mails always make it to the affiliate's account, but if they don't log in, they don't get your messages. You can check their log-in dates, but logging in doesn't guarantee them actually *reading* those messages.
2) You can request a return-receipt on regular e-mails, but some domains don't acknowledge those requests, and an affiliate can
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