sample
dear sir / madam,
thanks a lot for your order. but we have just received a message from x x x shipping company that your local customs will soon periodically launch a strict inspection of large packages.
therefore, we suggest a delayed shipment of your order so as to avoid possible troubles among the strict inspection. what is your opinion about it? please forgive us for the possible inconvenience. your kind understanding will be greatly appreciated.
if there is anything we can do for you, do not hesitate to contact us. thank you.
best regards!
(your name)
参考译文：
亲爱的先生/女士：
感谢您在本店下单。但是我们刚从xxx运输公司得知，贵地海关不久将开始对大件包裹展开阶段性的严格检查。
因此，我们建议推迟发货，以避免您的包裹在此次严格检查中可能遇到的麻烦。您意下如何？对可能造成的不便，恳请您原谅。衷心感谢您的善解人意。
如果有任何我们能为您做的事，请随时联系我们。感谢您。
祝好!
(你的名字)