Outgoing Earthlink email from iMac
Late January/early February my outgoing email went offline. Contacted Earthlink and found out a spammer was using my IP address it was put on a PBL blacklist. After many sessions and much back & forth, finally got outgoing email restored on Earthling WebMail but even though all settings are correct, I can still only receive incoming on my iMac, cannot send. All settings on iPhone, iPad, MacPro laptop and iMac are the same and correct with Earthlink but come up as "Cannot verify account name or password." Earthlink says because the restored my outgoing on WM, it's probably an Apple problem. Have deleted and restored account several times on iMac, but cannot get Mail to verify. Hope someone has some suggestions and or insights. Thanks
iMac 21.5″, macOS 10.13