Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456 Postmark Time to Inbox (TTI)
Postmark - Time to Inbox (TTI)
Time to Inbox (TTI) is the length of time it takes from when an email is sent from a client until it is logged as delivered.