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Can’t Access E-Mail using Outlook or Mac Mail (Error Code 3170)Starting on 10/2/19, I’ve started getting the following error message: “Outlook cannot find the server. Verify the server information is entered correctly in the Account Settings, and that your DNS settings in the Network pane of System Preferences are correct.” I made no changes to my Outlook e-mail client; this just started happening out of the blue. Then as a test, I attempted to download my e-mail via Mac Mail. This also failed to connect, just got a spinning wheel that forced me to use a “force-quit” to get out of the Mail app.I updated my Cox password and also tried resetting the modem. It should be noted that I’m able to access my Web Mail via Cox’s main website; no problems there.Because I cannot access my e-mail using two separate e-mail clients, I strongly believe that the problem is with Cox. My system details: Outlook for Mac 2011 (14.7.2)Mac Mini running Sierra 10.12.6 Although I’d made no changes to either e-mail client, I reviewed the Port settings for both servers (993 and 465) to make sure they were correct. The “Use SSL to connect (recommended)” check boxes are checked for both Incoming and Outgoing. For Authentication I have “Use Incoming Server Info” applied (I also tried “User Name and Password” to no effect).I’ve had issues with my Cox e-mail several times in the past, so I’m quite familiar with how to set up my e-mail clients with the correct information. I would greatly appreciate any and all assistance, advice, help! Thanking in advance...
I was able to finally create my Mac Mail account, but only when in Safe Mode. However, now when I boot up normally, I still can't connect; must be some type of corruption somewhere. Connection Doctor just shows a never ending spinning wheel. Obviously, I don't want to have to start up in Safe Mode every time I want to use Mac Mail. Any ideas, thoughts, suggestions would be greatly appreciated!
I finally found the solution. It wasn't a Cox problem, nor was it an e-mail client problem. Turned out to be a 3rd party software issue.
On the Apple discussions forum, it was suggested to download the EtreCheck diagnostic app for Mac; it paid off. The problem turned out to be the following “Unsigned” file: com.DataFormatSearchP.plist. I have no idea what an “Unsigned” file is, or what this one did, but deleting it fixed my problem. Mac Mail is finally working!
Thanks for everyone's replies.