Short update. It looks like things have improved and gmail doesn’t bounce emails anymore in the last week. And very few in the 2 weeks before.
All suspended emails have been enabled about 2 weeks ago and should receive emails.
As a reminder please check spam folder occasionally and mark email from the list as not spam. This will improve over time to keep all MLNA emails in your inbox. Even better create a filter with setting “Never send it to Spam” enabled if you are familiar with gmail filters.