Quote:
Originally Posted by eUK-Thomas
...I would also suggest you take a look at your server mail queue, as the messages could probably be stuck there, and not always on the server in which your trying to send email to.
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Judging by my own recent experiences with Yahoo mailservers (and yes that seemingly includes traffic to BTInternet) there's a strong possibility that many of those delays are due to the messages being grey-listed and therefore stuck in your server's mail queue for hours (occasionally days) at a time. As a reseller you have no means to monitor the queue and/or try to force delivery manually ...
I have an open ticket with Yahoo about this and they're being particularly slow in responding!