Probably in connection with this behavior of the servers need to add in delta.chat “setting” which would give the opportunity to divide the message by “group” into parts that is (the author of the topic has already suggested here Ограничения почтовых серверов - #4 by Evgeny almost the same, but I wanted to describe my version, I hope you understand):
1-user of the group knows about restrictions on the maximum number of recipients of the creator of this group. This could be output by chat automatically because chat itself knows what servers have limits on “number of emails”.
2-User (the creator of the group) himself in delta.chat enters a number in the “settings” delta.chat - what the maximum number of recipients can be to 1 message on the server that he uses and after reaching this limit to divide the recipient list in parts to send the “next portion”.
3-delta.chat calculates whether or not the server limit (maximum number of recipients) reaches the “group message” limit, and if the server used by the message sender (the founder of the group) is not sending the same (large) number of messages - delta. chat just sends the same message in batches - i.e. in this case you send out 35 emails, then take another 35 emails from a subscription and resend the same message, now to them, and so on until the message will be sent to all from that group even if they are hundreds or hundreds of users/subscribers.
Moreover, it would be possible to make “another additional setting” in delta.chat so that people (members of the same group from which they receive messages here is an example Email provider comparison - #8 by Raiden where 50 letters per day are just a mockery of users) act as “forwarders” of group messages, something like what was implemented in FIDONET.
That (necessarily) “only by choice” people could “enable this setting” for themselves in delta.chat.
The essence of the setting is as follows.
I read that many servers have a limit on “the number of emails sent per day”. So if we have for example a group of 1000 people on the yandex server can send a message to a maximum of 35 recipients - we get 1000/35= delta.chat need to send 29 messages only to distribute the message to subscribers group of 1000 people.
So we can offer people who know that they have delta.chat running 24/7 to forward such messages to such groups through their servers. So if for example delta.chat needs to send 1 message to a group of 1000 people but there are at least 10 people in this group that have the same limit as on yandex (i.e. 35) would enable the “function I made up” (i.e. these people are sure that their delta. chat permanently 24/7 online) i.e. we have 1000 people in the group but only 10 more people can send messages to it. 10 people can enable this function in their settings as if they “act as a relay through their server” we get 10 people multiplied by 35 messages per each = 350 messages will be sent only by them and we ourselves (as a group founder) will have to send not 29 letters to send 1 message to the group but 1000-350=750/35= 21 messages (which is 38% lower). Plus, most likely out of 1000 people this feature could include more and then maybe even, we could stay within the limit. So the message would multiply on the “recipient nodes”.
of course - “this option” should be “at will only”. And it should be off by default. But it would be very cool if the participants of the group members (or rather their devices with delta.chat) would automatically resend messages of their group - to other users of their group.
Just imagine if a large number of people would include this forwarding feature. That way you could bypass many of the limitations of most mail servers!
p.s.
those who are afraid for their traffic or if your traffic is limited can be “setting” - “send through my device” up to 10mb “text per day” for example, or allow input by hand the number of restrictions - even 1mb per day - will already help distribute messages of groups in which people themselves and are members - that is, it is in their interest that these groups delta.chat were easy to organize on any mail server, of any country, even if there are restrictions.