It appears the confusion comes from the fact that ”$N hours from now” is ill-defined. Does the clock start ticking when the keypresses are registered? When the sender presses the Send button (apparently what Florian meant)? When the post enters TDF infra? When the voters are notified (apparently what Laszlo thought)? Something in between?
For e-mail we rely on the date information in the header and for the forum we rely on the time listed next to the posting. Both can diverge in theory - the e-mail client can be misconfigured (headers can help though), and due to slow internet connectivity the posting can take one minute to be sent. Last minute actions are always risky, like in the example you used regarding the candidacy that arrived seconds before the deadline.
Fortunately this doesn’t affect the outcome of this particular vote, but I would suggest spelling out the voting deadline in the future to avoid confusion. IIRC I showed the previous the board that Discourse has support for polls which can configured to close at a certain time and where only a given group can vote. That could be a technical solution to the issue.
If we spell out a concrete deadline, if someone wants to challenge that, they can say it was a bit shorter or a bit longer than 72h hours (e.g. drafting the message and then sending it five minutes later), so that doesn’t provide accuracy as well. We also had repeated discussions on what +1, 0, -1 means and what non participation in the vote means, if conditional votes exist etc., so I expect all sorts of challenges. Note that I speak in general, these are examples that happened over the years from various people, I am not refering to anyone individually.
That’s why the poll feature sounds interesting indeed. What worries me is that this forum has been in the past (ab)used to delete board member’s postings or even modify them. I don’t want to end up in a situation that a future board follows that pattern again. The e-mail notification provides some safety, as it is sort of immutable when the e-mail is out, if the modification happens after the mail was sent.
How is that via a poll? Are there e-mails sent when someone votes? Is the vote immutable from the Discourse UI, so such modifications are not possible unless someone has direct access to the box, or can people with moderator/admin rights modify a poll too?
Of course, also with a poll, someone can try to click five seconds to the deadline and then be too late - but, see above, last minute actions can be risky. That’s why e.g. tax offices have postbox with integrated clocks, and at midnight a layer is added automatically. What’s on the other side of the layer has not been received in time.