Proper mail time from hirelings, is this possible?

[QuadroTony]

I discussed about this in the comments to this addon, MailTime
http://www.esoui.com/downloads/info716-MailTime.html
AFAIK, we cannot make an addon to calculate time for the next mail from hireling, because the game displayed only client received time, not real received time?

right?
Explntion

for example i received an email when joined the game, and it displayed exactly the time when i get it, "<1 minute ago"

but in fact i can get anohter mail not after 12 hours of this one, but after an hour, because the real time of first received mail was not "<1 minute ago", but "11 hours ago"

so we cannot make proper timer of the mail's next arrival?

I thought the hireling mail start counting from the moment you earn the passive skill, isnt it? i mean if you get this skill at 12 am(3rd update), you will receive mails every 12 hours at every 12 am/pm if you are online 24/7 if you are offline, the mails still will be sent to you, but they will override each other, and when you become online at 8 am for example, you will receive last mail, from 12 pm and in 4 hours, in 12 am you will get the second one, isnt it?