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we are setting up a mail service which will send emails periodically.

There are two kinds of email.

One which is sent three times a day (8, 13, 17 o'clock). Another which MAY be sent at 8am depending on some criterion) So there is the potential for 2 emails to be send at 8am.

I am worried about a user receiving two emails from the same address at the exact same time being marked potentially as spam by the email provider (I'm not concerned about the user marking it as spam - they asked for these emails).

Since we will be using our company mail server, if it gets blacklisted by IP or email address we could be in a lot of trouble.

If anyone could shed some light on this that would be great - I couldn't find anything at all on the topic online. My question is quite simply, How likely is it that we have any kind of trouble doing this? (Spam going to their spam box or worse trouble, getting blacklisted)

Thanks

Worthy7
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  • Do you have any valid reason _why_ the mails should be marked as spam (other than time)? Don't you think there are many mails floating around which are delivered at the same time? – Lenniey Mar 27 '17 at 07:12
  • From the same address no, I couldn't think of anything. Can you? – Worthy7 Mar 27 '17 at 07:15
  • No...not at all – Lenniey Mar 27 '17 at 07:16
  • I just checked my own personal mail and even spam from Amazon has an hour delay or so. A few other newsletters I received on the same day were also staggered. – Worthy7 Mar 27 '17 at 07:19
  • Wait. What is your question? That if your mails are sent at exactly the same time they'll be regarded as spam, or that _if_ they're regarded as spam that they'll be delivered too late? – Lenniey Mar 27 '17 at 07:24
  • "How likely is it that we have any kind of trouble doing this?" I'm talking about spam. If you have dealt with this situation before and had no problems then let me know :) – Worthy7 Mar 27 '17 at 07:30
  • Not likely at all...why don't you just try it yourself manually? – Lenniey Mar 27 '17 at 07:33
  • As I said, if this gets us into trouble it will be big trouble. So asking the community first is a wise decision. Thanks for your input but do you have experience trying this? – Worthy7 Mar 27 '17 at 07:34
  • Our monitoring sends dozens of mails at exactly the same time if something big happens, to external users as well. Never had any problems and couldn't even think of it creating one, other than faulty spamfilters. – Lenniey Mar 27 '17 at 11:39
  • OK but does it send dozens to the same person at the same time from the same server? You seem to be dodging a specific point with every reply – Worthy7 Mar 28 '17 at 01:23
  • I'm not dodging anything, just trying to help? Again: _I_ can't think of any problem, if that doesn't suit you, alright. No idea what you're getting at. Anyway, I'm out...test it yourself, talk to your mail-server admin, to your ISP, whatever. – Lenniey Mar 28 '17 at 07:02
  • Possible duplicate of [How to send emails and avoid them being classified as spam?](http://serverfault.com/questions/48428/how-to-send-emails-and-avoid-them-being-classified-as-spam) – Jenny D Mar 29 '17 at 12:34
  • This is impossible to answer; email providers revise and alter their spam recognition systems all the time. There is no guarantee, ever, that any given email will be delivered. – Jenny D Mar 29 '17 at 12:35
  • So by that definition the answer is, Yes it could. Right? – Worthy7 Mar 31 '17 at 00:23

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