yeah, I just got my new 64gb 4s, and I've been trying to write a fairly long e-mail (my first on the new phone) but three times the Mail program has crashed when I was almost done composing--it's making me nuts! I don't know what to do, but I'm scared to keep trying, because it's a lot of work to do all that typing. Maybe I'll compose it on my Dell laptop at work, send it to my personal address, then forward it from there, but that's not going to be an acceptable alternative for the next 2+ years!
I am seeing dozens of instances of the same exact Mail crash in the Diagnostics reports on my 4S. I have copied the relevant bits below. If anyone else who is (or isn't) experiencing crashes of the Mail app would like to check and see if they see the same crash report(s), that might be very telling.
Hardware Model: iPhone4,1
Process: MobileMail 
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd 
Date/Time: 2011-10-18 09:10:35.072 -0500
OS Version: iPhone OS 5.0 (9A334)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x00000000, 0x00000000
Crashed Thread: 5
Thread 5 Crashed:
0 libsystem_kernel.dylib 0x30eb932c 0x30ea8000 + 70444
1 libsystem_c.dylib 0x37fbff54 0x37f72000 + 319316
2 libsystem_c.dylib 0x37fb8fe4 0x37f72000 + 290788
3 libsystem_c.dylib 0x37fd00d6 0x37f72000 + 385238
4 Message 0x306081cc 0x3059a000 + 451020
5 CoreFoundation 0x36fe180c 0x36f25000 + 772108
6 CoreFoundation 0x36f3c7da 0x36f25000 + 96218
7 CoreFoundation 0x36f3d224 0x36f25000 + 98852
8 Foundation 0x33b0a750 0x33a66000 + 673616
9 CoreFoundation 0x36fb2afc 0x36f25000 + 580348
10 CoreFoundation 0x36fb22c8 0x36f25000 + 578248
11 CoreFoundation 0x36fb106e 0x36f25000 + 573550
12 CoreFoundation 0x36f344d6 0x36f25000 + 62678
13 CoreFoundation 0x36f3439e 0x36f25000 + 62366
14 Foundation 0x33a6ab7e 0x33a66000 + 19326
15 Foundation 0x33a8452c 0x33a66000 + 124204
16 Message 0x305a40d8 0x3059a000 + 41176
17 libsystem_c.dylib 0x37f81c16 0x37f72000 + 64534
18 libsystem_c.dylib 0x37f81ad0 0x37f72000 + 64208
On Iphone 3GS. Since the upgrade to iOS5.0, mail crashes when hitting reply every time, however new emails and forwarding doesn't crash the app. Forwarding instead of replying might be a work around until someone at Apple adds it to the list of fixes to do in V iOS 5.0.1 available when enough people shout at them loud enough. Remember the alarm clock nonsense?
When this bug appeared in the past many suggested a hard reset (press power button + home button until the apple logo appears) and a soft reset (switch it off and back on again). That has no effect on my 3GS.
Forwarding from now on.
I'll throw my hat into the ring here as well. In my case my accounts were migrated through iTunes sync and they are normally working. However, I have random crashes of mail. Sometimes when launching the app, sometimes when attempting to reply, but always when some kind of user action has been called for.
I did the rubber chicken things rebooting the phone. I also powered off the phone and powered it back on. No change in behavior, and no delay in time before it occurs. Killing the app and relaunching doesn't help either. I've also not tried doing a restore of the phone.
I've noticed other apps crash from time to time but nothing on the order of mail. However, it could be they've not been updated to IOS5 compatibility. I expected Apple's apps to be fully tuned.
So, is this a software bug, or a possible hardware malfunction?
Same problem here. iPhone 4s using iCloud mail account that was converted from MobileMe (don't know if that has anything to do with it). Mail app crashes very frequently when drafting emails, but also when just reading an email. I've lost several drafts as I'm in the middle of typing a reply. Frustrating!!
I had the same problem, instant crash. After deleting and adding my mail accounts back, the problem is gone.
Go to Setting on your iPhone, then 'Mail, Contacts, Calendars', then click one at a time on your accounts. In the specific account settings, scroll to the bottom, and delete the account (all of them, one at a time). If you already have iCloud, it won't matter if you delete your information on the iPhone or not, you'll be given the choice to merge them when you add the account back. If you sync via iTunes on the computer, you can sync then as well. Always keep a fresh backup of your contacts somewhere besides you iPhone!
Then simply add your accounts back.. Use your iPhone in settings, or just open the mail app on your iPhone after deleting all accounts.
I went to the Apple store, and they did a complete software restore, but when I re-configured it with my e-mail settings, it was still crashing. So I went back again, and they replaced the handset. Sadly, it still crashes, so I guess it has to be something weird about the new OS that's incompatible with my e-mail settings or something. Good thing I haven't "upgraded" my iPad to iOS 5 yet, since it is configured the same way (as was my previous iPhone). I guess I'll have to try accessing my e-mail some other way--right now I'm using POP and IMAP, but maybe I could try setting up Exchange ActiveSync. Seems wrong to resort to a Microsoft solution to keep my device from crashing, though.