Looks like problem solved. Haven't adjusted any setting and G Suite accounts now working in Mojave 10.14.4. 
[doublepost=1554089995][/doublepost]I also find Mail is much faster in Mojave 10.14.4 running on a 2012 MacBook Pro. It was very slow prior to 10.14.4.
[doublepost=1554089995][/doublepost]I also find Mail is much faster in Mojave 10.14.4 running on a 2012 MacBook Pro. It was very slow prior to 10.14.4.