Update, to share the merits:
Delta-chat
Mr. Holger, chef of the developer company behind delta-chat, an email-network using, independent chat app, has joyfully given possibility of use of the software toward the Sangha of the Buddha and it's faithfull follower: Giving the possibility to make use of a messanger-software (Delta) by Mr. Holger
May the Venerables, out of compassion for the generous giver, make use of it.
May all find a remorse-less access to the members of the Sangha and fellows with it.
Since good further developments are surely good, one may feel invited to join such undertakings: Use of email-server based messenger - Delta similar - possible for Sangha?
In the case Venerable but also Upasaka, Upasika, would benefit and/or need an conscious given email account, may it be seen as given by the original donor to contact for request via forum.sangham.net or send an email to: samana(dot)johann[at]sangham{dot}net. An comfortable automatical registration for a given email is not developed yet.
May many be able to come together under good conditions with inspiration toward the tripple Gems and Unbond with it.

Anumodana!
Telegram
Dedicated for the members of Sangha of the eight directions, first the Theras and all fellows, their faithfull follower and open for all wishing to build up Upanissaya with the Buddhaparisa, the Triple Gems, by merits of many kinds, like sangham.net and its forum, my person currently looks if such as a common-world-independend possibility of a modification of telegram could be made avaliable.
Currently taken on trust, and as test, the messenger access can be found under: t.me/joinchat

If whoever having the possibilities feels inspired in work on development, currently there is an active topic: Use and implementation of Telegram possible?.
To make it most proper for good monks and serious practicing laypeople, so to be able to use on what is given and without strings, bounds trades, it sure requires some wise and good effort into the right direction, given and rightly independency.
The Liberal on archery skills:
Let donors build
pleasant hermitages
and there invite the learned to stay.
Let them make reservoirs
in dry forests (internet)
and walking paths
where it's rough
Let them, with a clear, calm awareness,
give food, drink, snacks,
clothing, & lodgings
to those who've become
straightforward.
[Note that this isn't given for stacks, exchange, world-binding trades and also not a rebel-undertaking, but simply a gift toward release from this wheel]