Apple Mail not working after installing new modem

You have to be very careful if you use Static IPs, normally you want to use Ising DHCP, which is where the Touter or Modem Hands out IPs.

What Ports & Authentication are you using on SMTP?

Outgoing ports are...

SMTP and SMTP-SSL is on ports 25, 587 and 465. Port 587 has to be SSL, and port 465 is enforced TLS-wrapped and is generally used by Outlook users.

Have you changed your eMail password lately?

Works sometimes even if you haven’t

Open Keychain Access in Utilities, then either check the Password under that item, change it, or delete it and start over.

Enter the part after the @sign in the search bar.

You may have duplicate or more entries in Keychain Access.

If using a browser to login via WebMail works it's not Name or Password, but likely old passwords interfering.

There''ll be at least 2 entries, maybe more.

The trouble is that Mac Mail almost always chooses the old Passwords if you don't change or get rid of the old ones.

Make a New Location, Using network locations in Mac OS X ...

http://support.apple.com/kb/HT2712


System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.


If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.

Thanks yes.

You have Adware, did you click on the remove link?

Configuration profiles present - This machine has configuration profiles. These are sometimes used by adware and malware.

To remove a configuration profile in macOS:

1. From the Apple menu, select System Preferences....
2. From the View menu in System Preferences, select Profiles.
3. Note:
4. Profiles won't be visible until you have at least one profile installed.
5. Select the profile you want to remove, and then press the - (minus) button. Click Remove to remove the profile.

Delete these files& Restart...

Adware:
  Launchd: ~/Library/LaunchAgents/com.appbox.AppBox.plist
    Executable: ~/Library/Application Support/AppPolicy/AppBox -i -c 748931 -isn 467D32D4-BC9B-434E-808A-721AD3904800
    Reason: Adware pattern match
  Launchd: ~/Library/LaunchAgents/com.unionsoftwareonline.AppMonitor.plist
    Executable: ~/Library/Application Support/AppCommon/AppMonitor --protect
    Reason: Adware name match
  Launchd: ~/Library/LaunchAgents/com.GlobalConsoleSearch.plist
    Executable: ~/Library/Application Support/com.GlobalConsoleSearch/GlobalConsoleSearch r
    Reason: Adware pattern match
  Launchd: /Library/LaunchDaemons/com.GlobalConsoleSearchDaemon.plist
    Executable: /Library/Application Support/com.GlobalConsoleSearchDaemon/GlobalConsoleSearch r
    Reason: Adware pattern match

~/Library/LaunchAgents/com.pcv.hlprmcp.plist

~/Library/LaunchAgents/com.adobe.ARM.***.plist

~ tilde indicates hidden Home Library.

Apple hid the Users' Library folders...

Method 1:

1 From the Finder, select the Go menu at top of the screen, and choose Go to Folder.

2 In the window that opens, enter ~/Library, and click Go.

Method 2:

1 Go to the Finder (or desktop).

2 Hold the Option key on your keyboard, and click the Go menu at the top of the screen.

3 With the Go menu open, you'll notice that pressing and releasing Option will display or hide the Library choice in this menu.

4 Select Library from the Go menu (while holding down Option) to access the hidden folder.

Are you running any VPN or anti-Virus software?

EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.

http://www.etresoft.com/etrecheck

Pastebin is a good place to paste the whole report...

https://pastebin.com/

Or use the paperclip at the bottom of a Reply to attach the full report here. :)

It's generally Malware or VPN, or AV software that sets that, Passive ftp & such should have no effect.

https://www.bleepingcomputer.com/forums/t/700111/socks-proxy-keeps-re-enabling-at-every-startup/

Whoot, Great news, would hate to share my straight jacket!

No need to really Remove it OR keep it, but you can easily go either way. :)

All those should be there, just none checked.

Did you create a new Location back at the start of this?

Maybe another etrecheck report?