can't say why. I just see delivery errors in logs. maybe some network problems, maybe some protocol inconsistencies between platrorms/servers, maybe connectivity data is wrong in servers' public interfaces like webfinger, or something. just the fact.
at the moment, I have contacts that followed me on these servers and I'm pretty sure they can't read this post. as well as I cannot reach the admins of these servers because I get HTTP errors and/or other weird answers from their servers. so I just make it public, pin the post and just leave it here. if you can see this post and see your server in the list, please check the connectivity to my server or ask your admins. if they blocked my address or something I want to know because I need to block them in turn to stop this strange and bothersome undelivered posts resend attempts on my side.
if you're an administrator of these servers and want to solve connectivity problems - I'm ready to get into details and see what's going on from logs on my side, etc. I'm programmer and I always stand for normal server interconnection.
some servers are banned on my side. I do this just in case a server breaks the network exchange rules, has spam/malware/porn content or has banned my server by some I-don't-really-care reasons to prevent the posts resend cycles. I'm not aggressive dork but roaches in somebody's heads are not my problem. I may dislike some users and I may block them but usually this does not come to blocking whole servers. blocking servers is stupid. but when I get blocked I have no other choice but block them in my turn because futile delivery attempts waste network traffic and CPU on my server. I don't see reasons for this.
some IPs may get banned on my side: if I see problems from some network address like ddos-like messages attacks, scraping, script bots, malicious behavior, attempts to break protocols, etc. I block such things without a special notes. I think Fediverse is not a place for spam and malicious attacks.
@iron_bug i sent you a follow request, it would be nice if you accept it or if you could send me a DM. If its an issue about non public post and notify me afterwards. If its an issue with non public posts, then this should reveal it and give me some informations so that i can lookup our log. I guess before such tests are done, you also dont need to collect informations...
@Jain ok, I will try to collect data exactly for your server. when I have time for this. but as I remember it fails to deliver posts to inboxes of certain users. this post is public (on purpose) and I rarely write public posts, usually posts are limited by subscribers. and my server cannot deliver such post to your server
@iron_bug yes, as i said in my first answer, just write me a dm, write a follow only post and tag me or accept my follow request. no need to dig into logs if its working now
@Jain I will try to create a post shared with you to disscuss logs. but I'm not sure it will work out. becuse there may the same problem with delivery to user inbox. we'll see.
@Jain I created a post addressed to you. and we'll see if it's delivered to your server. for a while I get HTTP error 400 when I try to deliver posts to my subscriber on your server. my server periodically tries to re-send the undelivered posts. so I guess there're should be a plenty of records with errors on your side. I'm busy now and will get back in 5-6 hours later to see if the post was delivered. you can check your logs there for error 400.
@Jain I accepted you as subscriber, otherwise Friendica didn't let me send a non-public message to you. if you fix the error with HTTP it may flood you with messages for my subscribers that are barely interesting. just unsubscribe then. I just need this to check the sending to subscribers.
@iron_bug I couldnt found a issue on my end but could you do me a favor? I do have a testing server with the same version to test issues and i just changed the log level to debug. Please send a DM to @Nya and write me the timestamp when you sent it.