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)