The point is lost on you. So here it is, spelled out: There's a huge difference to most, "Senders" between a 250 and any kind of 4xx or 5xx refusal. Some top tier ESPs even have real-time graphs!
Aloha, Michael. -- Sent from my Windows Phone ________________________________ From: Renaud Allard via mailop<mailto:mailop@mailop.org> Sent: 6/9/2016 4:16 AM To: Eric Henson<mailto:ehen...@pfsweb.com> Cc: mailop@mailop.org<mailto:mailop@mailop.org> Subject: Re: [mailop] Microsoft/Hotmail discards mails On 06/09/2016 12:39 PM, Eric Henson wrote: > You're giving spammers very valuable information on which of their emails are > classified as spam and which aren't. How so? There is no difference in rejecting a spam with 5xx and rejecting it with 5xx but still delivering it into junk folder. The only way to not give info to spammers (if they even look at it) is to accept and drop the mail, which is the probably worst thing you can do. I am not sure spammers are reading the reasons for a reject, but real people (at least mail admins) need to know why a legitimate mail has been rejected.
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