I mean that should be fine. Just if your using a name in the message, like in the signature and your email says
[email protected] and your signature says Mark - that might be a good reason for someone to not contact your or think your fake and complain etc..
I run different campaigns each with its own individual url. The reason I do this is because I use a unique opt out domain that is locked to that offers domain. Else if you spin out your offer urls and opt our urls you will have messages going out with different combos and if you get 1 offer domain filtered and that domain comes thru again with a different opt out domain, then you can get that opt out domain filtered, then the filters see that opt out domain with an entirely different offer domain and they then filter out offer 2 domain. If that makes sense.
Thats my logic, I didn't really test it heavily, but just with all teh different other blacklists and filters I encountered it made sense and I couldn't see a downside, other then a few mins to setup a different campaign. So I went with it. I also often use different messaging and subjects for each campaign as well, to avoid those sorts of filters although Im still testing on the large scale how that really affects things.
60K sends per 24 hours and I rest it on the weekend. I found 1 high level blacklist I got on that if I just stopped all sending I was able to get off of it after 24 hours of no sending. so I used that logic and spread it to other campaigns that a break is good. Also for most of my customers they don't want to send on the weekened anyway. I don't always hold to this rule, sometimes I load in 1 million domains and just send 7 days a week until its done and then I let it rest a day or 2 after its done before sending more. At 60K a day accounting for some failure its about 10 days, give or take for that to run, which for the most part seems ok enough.
I am a perfectionist so I have to fight over optimization or I would optimize it to the hilt and never get any real work done, so i force my self to get into the "good enough" realm and keep moving.
I split tested for mutliple weeks sending over a 24 hour period and also just sending them all as fast as they would go and then pausing until the next day. Click thru rates were the same either way, so it worked better for most clients to do sending during business hours so thats what I do now.
There is no delay but if you wanted to limit it per hour thats sort of a "delay" just a chunk and then wait. but like I said that didn't seem to matter, so I doubt a delay feature would matter either, but since there isn't one I have no data on that.