The maintenance dose of buprenorphine HCl and naloxone HCl sublingual tablets is generally in the range of 4 mg/1 mg buprenorphine/naloxone to 24 mg/6 mg buprenorphine/naloxone per day depending on the individual patient. Dosages higher than this have not been demonstrated to provide any clinical advantage.
Greylisting is a term used by services such as URIBL to designate aspects of sender reputation and overall deliverability. Currently, URIBL maintains a set of whitelists, blacklists and greylists. According to URIBL's website, a greylist is defined as:
There are no negative effects from being greylisted. Though this can cause false positive scores when reviewing the message, your messages will still be sent out without issue. Many common domains will appear on URIBL greylists regularly.