system preferences wants to use confidential information stored in my keychain

Images are not being displayed in emails on my Mac. This includes sending photos from iphoto via email. When going in to System Preferences to see what I need to check, I get the window which reads "System Preferences wants to use your confidential information stored in "imap.aol.com" in your keychain. Should I "always allow", "deny" or "allow"?

I recently synched my contacts via icloud with my mac and my iphone (which created a whole different problem). That is the only thing I can think of that I have done recently (?). Speaking of the contacts issue, now my phone does not have the phone numbers and all of the information of my contacts as I had on my phone before the icloud synch. Now, the contacts in my phone seem to be mostly email addresses that were stored on my mac and no phone numbers!!! WT? Help. My love for Apple is waning.