On 8/4/2011 9:57 AM, Alejandro Facultad wrote: > What is the difference if the recipients opt in receive the mails or not, > from the point of view of spam black lists ???
No difference, if you're referring to DNSBLs. Almost all are trap driven. So if you're sending to real customer addresses, you won't get listed on DNSBLs. If many of those 15K addresses are at gorilla receivers such as gmail, hotmail, yahoo, aol, you will run into delivery rate problems, "this is spam button" problems, etc. In which case you should read the list archives. This type of bulk sending, almost an identical scenario, was covered recently, within the last month or two. -- Stan
