[Update 21-5-2012: Samsung released new firmware, version I9100XWLPD, which seems to fix the bug.]
Since updating my Samsung Galaxy S II to Ice Cream Sandwich, I’ve regularly been experiencing the dreaded “connection error” in the mail client when trying to fetch mail from the corporate Exchange server. A colleague of mine, who agreed to have me upgrade his SGS2 after I promised everything worked flawlessly, had the problem even more regularly.
Searching the web turned up this interesting thread on xda-developers, which had amongst others a fix for the adventurous, but also this eye-opening comment:
The messages in question are Read Receipts, Delivery Receipts and similar messages. Once there is one of those in your inbox, you’re stuck until you delete it. […] A better solution which has worked for me is to create a folder for your receipts. Then, on your PC, create a rule to move the receipts to the folder on arrival. This will obviously also work when your PC is off, as the rules are stored and executed on the server. You will have to create a rule which processes emails on arrival, matches a series of strings in either subject or body of the message and moves them to the folder.
And that’s exactly what I did; mails sent only to me with “Declined:” or “Accepted:” or “Tentative:” or “Read:” or “Not read:” in the subject line are automatically moved into a “tmp” folder. Your mileage may vary (apparently there are other conditions under which the Android/ Samsung mail client has problems downloading items form Exchange), but based on my limited experience up until now, this workaround gets most problematic items in my Inbox out of the way. Now let’s hope Samsung fixes this blatant error (and that it isn’t in the ICS-version on that beautiful Samsung Galaxy S III)!