Constant email password request

Question

I was told by apple support that the email server bandwith whether it is attnt (mine) or another is the problem. it is not the mail set up. if you select the cancel button your mail eventualoy shows up. Has anyone the same issue. It is constantly annoying all day and all night long. So I must think it is also a mail problem, as I never had this issue on my windows outlook....

Answer 1

Open /Applications/Utilities/Keychain Access, choose Keychain First Aid from the application menu, and proceed to repair the keychain. If that doesn’t work, you may try removing the password entry from the keychain and letting Mail create it again the next time it asks for it.
Note, however, that Mail often doesn’t correctly report what the problem really is. If Mail can connect to the server but cannot log into your mail account for some reason, it’ll ask for your password regardless of whether that’s really the problem or not. Don’t keep entering the password every time, because that’s not the problem (click Cancel instead, and take the account back online afterwards).
Some ISPs refuse connection attempts if they are too frequent, for example, or limit the number of simultaneous connections that are allowed from the same IP address, or there may be too many messages on the server and Mail times out before the server responds, or there might be a problem with the network, or there might be a problem with the server...
Do you access this account from more than one computer or some other way (e.g. webmail) while Mail is checking for mail?
What’s the time interval chosen in Mail > Preferences > General > Check for New Mail? If it’s set to Every minute, try changing it to Every 5 minutes.
If this is a POP account, what are your Preferences > Accounts > Remove copy from server settings?
Go to Apple Menu > System Preferences > Network, choose Network Port Configurations from the Show popup menu, and make sure that the configuration used to connect to Internet appears at the top of the list. Leave checked (enabled) only the port configuration needed to connect to Internet and Built-in Ethernet (in that order if not the same), uncheck (disable) the rest of network port configurations and see whether that helps — if it doesn’t, turn ON again the ones you want enabled.
Try using a different method to connect to Internet, if possible, or connecting the computer to Internet as directly as possible (i.e. bypassing any routers that might be present, using an ethernet cable instead of wireless, etc.), and see whether that makes a difference.