Hey @egoecho, previously our mail was coming from a shared IP address, which meant we could get roped in with other spammers on that server. Just this week we started switching to our own IP address, which should completely fix this after a bit of time (it’ll just take several days to get transferred over and get our mailing reputation established).
In the meantime, please be sure to keep marking messages as not-spam to help us out with this. Thanks for doing that, and for your patience as we roll this out!
Also, we just brought this feature out of Labs today! We’re continuing the conversation / discussing the announcement over on this thread: Write.as Letters