We are having problems with our order & despatch confirmations being blocked by some servers. We have been told by our developer that we have no control over the receiving server which although makes sense seems an unacceptable explanation as there are many email providers this affects. @mac.com, tiscali.co.uk, hotmail etc Any advice would be much appreciated.

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closed as too broad by Sukumar Gorai, sv3n, Jai, Dhiren Vasoya, Manashvi Birla Oct 12 at 4:57

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