letter attachments..

Does anybody know whether there is a limited amount of letters that are able to be stored?
Reason i ask is because my warehouse is limited same as everybody elses. so i started to save my attachments i gotten from battles so i can access them later..
Just now i went to check and i realised as i scrolled down my inbox that loads of previous letters were no longer there.. i then thought maybe there was a limit to the amount which was viewable and if i claimed a few gifts then previous old letters would show up.. but sadly no....
I have lost so many v.i.p cards/ enhancements stone/ chests/ synthesis stones i had saved.. I am so pissed..... if i would have known, i would have claimed them all sooner.....

10,if i didn't miss it

There's always a limit to the amount of items that can be in your mail, always keep a close eye on your items in mail so that you do not lose them

Its so ridiculous... But i suppose this wasnt allowed as using mail was another alternative to warehouse.. Im getting over the issue now but if i would have known i would have sold everything.. Owell i hate to pay for ingame currency but last night i purchased a 50 coin £2.99 package because i had no choice but to increase my warehouse by 4 extra slots.. i already had increased it by 2 with the free 20 coins we all start off with when i started..

Just remember guys DO NOT accumulate too much inbox gifts as you will lose them..