Mojave, MacMini: mail does not receive email from gmail, webmail for gmail works.
Mojave mail suddenly stopped getting email from gmail, though webmail still worked for Gmail. Later the computer crashed with an error related to SECD, and everything returned to normal for some days, however, when the computer booted, after a power break, everything turned bad again, and also cannot connect to icloud with "unknown error".
Mac mini, macOS 10.14