Our current shared hosting can't be used any longer to send email to hotmail/live accounts - presumably due to other users spamming, though none of the IP addresses are on blacklists and SenderBase gives them neutral email rep (except for a related domain, same provider). So, I need to change providers.
Is there a way to check in advance if a provider will be blocked by hotmail/live or other Microsoft services? Unfortunately our users often have hotmail accounts; we don't want to switch providers and have the same problems.
FWIW we never send out group emails - we're only replying to customer inquiries received from our website.