In general you should avoid doing your email through giant providers like Microsoft and Google. They just don't care. Smaller providers are more interested in ensuring that everything is actually working.
The small providers can get caught in the gears of large providers or even smaller providers using idiotic RBLs (sometimes a single one that causes a permanent reject). Nobody dares block Gmail or O365 however.
But you won't have an undiagnosable spam filter. Depends on your risks.
Comments
In general you should avoid doing your email through giant providers like Microsoft and Google. They just don't care. Smaller providers are more interested in ensuring that everything is actually working.
Both approaches have their downsides.
The small providers can get caught in the gears of large providers or even smaller providers using idiotic RBLs (sometimes a single one that causes a permanent reject). Nobody dares block Gmail or O365 however.
But you won't have an undiagnosable spam filter. Depends on your risks.
So true. Also running your own mail server can be a nightmare with bigger problems.
This is generally not practical for medium to large companies.