Eric thanks for the response.
Still no Apple Mail send from: Apple Mail v 11.5. - iMac i7 late 2013 High Sierra v10.13.6
Apple Mail App not sending from iCloud (@me and @icloud )accs. Hangs in outbox.
Gmail accounts send OK
Working Ok from: i5 iMac Sierra and MacBook Pro ElCapitan? Uh huh. they were not working 24hrs ago?
Booted i7 in Safe Mode...same issue.
Reboot - run EtraCheck see below.
Next step a clean install of Mojave?
Thanks again for taking time out.
EtraCheck Report
Problem description:
Apple Mail App not sending from iCloud (@me and @icloud )accs.
Hangs in outbox.
Sends OK if use other server option eg any Gmail acc.
Gmail accounts send OK
Apple Mail v 11.5
iMac i7 late 2013 High Sierra v10.13.6
EtreCheck version: 2.1.1 (104)
Report generated 1 November 2018 at 09:12:34 GMT
Hardware Information: ℹ
iMac (21.5-inch, Late 2013) (Verified)
iMac - model: iMac14,3
1 3.1 GHz Intel Core i7 CPU: 4-core
16 GB RAM Upgradeable
BANK 0/DIMM0
8 GB DDR3 1600 MHz ok
BANK 1/DIMM0
8 GB DDR3 1600 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless:
Video Information: ℹ
NVIDIA GeForce GT 750M -
iMac 1920 x 1080
System Software: ℹ
macOS 10.13.6 (17G3025) - Uptime: 0:7:56
Disk Information: ℹ
Samsung SSD 840 PRO Series disk0 : (256.06 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
disk0s2 (disk0s2) <not mounted> : 255.85 GB
USB Information: ℹ
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. FaceTime HD Camera (Built-in)
Logitech USB Receiver
Thunderbolt Information: ℹ
Apple Inc. thunderbolt_bus
Apple Inc. Macintosh
Gatekeeper: ℹ
Mac App Store and identified developers
Kernel Extensions: ℹ
/Library/Extensions
[loaded] com.Cycling74.driver.Soundflower (2 - SDK 10.10) [Support]
[loaded] com.Logitech.Control Center.HID Driver (3.9.7 - SDK 10.10) [Support]
[loaded] com.Logitech.Unifying.HID Driver (1.3.7 - SDK 10.10) [Support]
[not loaded] com.contourdesign.shuttle.kext (3.0.39 - SDK 10.8) [Support]
/System/Library/Extensions
[not loaded] com.devguru.driver.SamsungComposite (1.4.45 - SDK 10.6) [Support]
[not loaded] org.dungeon.driver.SATSMARTDriver (0.8.1 - SDK 10.6) [Support]
/System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
[not loaded] com.devguru.driver.SamsungACMControl (1.4.45 - SDK 10.6) [Support]
[not loaded] com.devguru.driver.SamsungACMData (1.4.45 - SDK 10.6) [Support]
[not loaded] com.devguru.driver.SamsungMTP (1.4.45 - SDK 10.5) [Support]
[not loaded] com.devguru.driver.SamsungSerial (1.4.45 - SDK 10.6) [Support]
[not loaded] com.samsung.driver.ssudumdrv (1.3) [Support]
Problem System Launch Agents: ℹ
[loaded] com.openssh.ssh-agent.plist [Support]
Problem System Launch Daemons: ℹ
[not loaded] org.ntp.ntpd-legacy.plist [Support]
Launch Agents: ℹ
[loaded] com.google.keystone.agent.plist [Support]
[running] com.adobe.GC.AGM.plist [Support]
[running] com.Logitech.Control Center.Daemon.plist [Support]
[not loaded] com.adobe.AAM.Updater-1.0.plist [Support]
[not loaded] com.adobe.GC.Invoker-1.0.plist [Support]
Launch Daemons: ℹ
[loaded] com.github.IngmarStein.Monolingual.Helper.plist [Support]
[running] com.adobe.agsservice.plist [Support]
[loaded] com.google.keystone.daemon.plist [Support]
[loaded] com.rogueamoeba.aceagent.plist [Support]
User Launch Agents: ℹ
[loaded] com.adobe.AAM.Updater-1.0.plist [Support]
[loaded] com.digitalrebellion.PreferenceManagerAutoSave.plist [Support]
[not loaded] com.adobe.GC.Invoker-1.0.plist [Support]
User Login Items: ℹ
None
Internet Plug-ins: ℹ
AdobePDFViewer: Version: 8.1.0 [Support]
QuickTime Plugin: Version: 7.7.3
Flash Player: Version: 9.0.45.0 Mismatch! Adobe recommends 31.0.0.122
AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 [Support]
Safari Extensions: ℹ
Extensions: No such file or directory
iTunes Plug-ins: ℹ
iTunes Plug-ins: No such file or directory: Version: Unknown
User iTunes Plug-ins: ℹ
iTunes Plug-ins: No such file or directory: Version: Unknown
3rd Party Preference Panes: ℹ
Logitech Control Center [Support]
Time Machine: ℹ
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Destinations:
TIME [Local]
Total size: 333.02 GB
Total number of backups: 1
Oldest backup: 2018-03-09 10:26:32 +0000
Last backup: 2018-03-09 10:26:32 +0000
Size of backup disk: Excellent
Backup size 333.02 GB > (Disk size 0 B X 3)
Top Processes by CPU: ℹ
6% WindowServer
2% mds_stores
1% fontd
0% launchd
0% SystemUIServer
Top Processes by Memory: ℹ
120 MB mds_stores
86 MB WindowServer
69 MB DriveDx
52 MB mds
52 MB Spotlight
Virtual Memory Information: ℹ
12.93 GB Free RAM
2.26 GB Active RAM
647 MB Inactive RAM
1.34 GB Wired RAM
1.39 GB Page-ins
0 B Page-outs
Diagnostics Information: ℹ
Nov 1, 2018, 09:05:09 AM Self test - passed
Oct 31, 2018, 05:16:53 PM YaraScanService_2018-10-31-171653_[redacted].cpu_resource.diag [Details]
Oct 31, 2018, 12:19:45 AM firefox_2018-10-31-001945_[redacted].cpu_resource.diag [Details]