It depends on when you sent the postcards.
At Russia’s expense, I can say that if the postcard was sent earlier, they still have the opportunity to receive it, especially since not all countries have banned sending postcards to Russia.
And at the expense of Ukraine, I can say that we accept postcards from all countries and also can send, but it takes a little longer because they are in transit from Poland. Also keep in mind that many people from Ukraine became homeless and had to move, which may also be the reason why they may not receive a postcard.
Also, you can always ask at your post office Can you send postcards to this country? (I did so).
And if you get addresses from these countries, if you are worried that they will not receive the postcard, you can not send, I think nothing bad will happen.
Sending cards from Germany to Russia ist no problem at all. Deutsche Post still delivers to Russia. And as @RalfH already said above, they’re even faster than we are used to. My last card to Russia was registered after only 13 days.
I haven’t had an official to Ukraine for a long time, so no recent experience. But nothing to worry too much as it has not been very common to draw an address there even before.
I do get a lot of Russian Recipients drawn. All have arrived since, but all of mine took on average > 30 days, the last one was just received 3 days ago, so it’s still current data.
I try to keep the text politically neutral in case there’s content scans going on, and I make photos from both sides and add a return address in the top-left corner for safety, but didn’t need any of it so far.
If thair is no political statement Information about the war on the postcard the cards deliver. From germany no problem but spme times it takes a bit longer.
I have three cards travelling to Ukraine (I’ve drawn their addresses on the 8th, 11th and 16th February. All of them are active and have registered cards in March, one of them three yesterday. I am not worried about my cards, they may be registered or not, but it is so trivial in this situation. I am just happy to see that Postcrossers to whom my cards are travelling are alive and hopefully well.
RU:
1 sent on Feb 28 was registered on Mar 31
1 sent on Mar 13 was registered on Mar 29
1 sent on Feb 17 was registered on Mar 27
travelling: 10x 2021, Jan 29, Feb 28, Mar 2, Mar 20, Mar 27
BY:
1 sent on Mar 13 was registered on Mar 22
travelling: Jan 5, Feb 5, Feb 6, 2x Mar 27
So far nothing changed from before to after. Mail to/from Russia is between 14 and 100 days…
My postcard to Russia reached the person (I mailed the card before the war) and he asked me to send a card to his extended family in Ukraine. I sent one and others to Ukraine since the war began. I believe and trust that these people will receive the greetings and support from us in Postcrossing. People should not be punished for what their leaders do or do not do. But that is just my opinion. KINDNESS counts, always!
That doesn’t seem to be a problem either. Several of my cards made it to Russia inspite of mentioning the war in the text.
And I have received cards from Russians openly writing about the war - and not along the lines of the official propaganda either.
On Wednesday, four of the cards to Russia for the account of my wife have been expired.
Yesterday, four of my cards to Russia have been expired. From the four new addresses I have drawn were three from Russia - and I don’t have checked “repeated countries”.
I really do not like this way of allocating addresses.
That would be very illogical, wouldn’t it?
I mean, the kind of mail you get from a TOTAL STRANGER doesn’t say anything about you, does it?
Anyway, the way Russians write very openly in online messages - which are much more easily supervised - lets me think they are much less worried about their secret services than people are in the West…
Well, that’s two different issues really. Happened a lot during the pandemic. There were long months when I could send to Taiwan from Poland, but the Taiwanese couldn’t send to Poland, when I received cards from Chile although I couldn’t send there. Same with some other countries… And it didn’t really make any sense regarding the COVID situation. Like Taiwan accepted potentially contaminated mail from Poland when things were very bad here, while there were hardly any Corona cases in Taiwan
As for worrying about “third parties” reading our postcards - or “fourth parties” really, the third party being the postal workers - we should certainly do this with China and the USA as well. At least the extremely varying delivery times would suggest that…
Back in the Cold War, I used to have a pen-friend in East-Germany - myself still living in West-Germany back then - and with both German Posts working very reliably, our letters always took either 3-4 days or over a week to travel. Never ever was it 5 days or 6 - which suggests that the 3-4-day-letters went unread, while the others were probably checked for dissenting content
But I think if we let this make us write “small talk only”, this would be like the famous “scissors in our heads” - it’s like playing into the hands of “Big Brother”…
I actually once considered doing the exact opposite with my e-mails - i.e. always putting a list of suspicious keywords at the end of may mails - things like “bomb”, “target”, “president” etc. - just to get the secret services read ALL my private mail… and thus waste their time
Got this idea after some spooky experience with a mail from me to my sister , in which I had used “secret service language” just for fun. My mother, getting very old, had no longer felt up to travelling the long way to Warsaw all on her own. So I had travelled to Berlin just to help her changing trains and accompany her the rest of the way. Back home, I let my sister know by e-mail that all went OK. but what I wrote was something along the lines of “Contact made succesfully. Target person delivered to agreed destination.” But the next day my sister phoned to find out if our Mum had made it safely to Warsaw. She hadn’t received that mail! She did receive it three days later - which made it all the more spooky…
Allowed isn’t necessarily the correct word here. The Finnish post has stated on their website that they continue to deliver to Russia (and Belarus), as this is their legal duty, although travelling times might be longer now. The case may be the same with the German post. One of my most recent cards to Russia sent in the middle of March was registered in two weeks.
As it has been pointed out, it’s recommended to suspend one’s postcrossing activity on the official site if one doesn’t want to send to Russia. Maybe to engage in forum activities like tags and round robins instead?
to my sister 
, in which I had used “secret service language” just for fun. My mother, getting very old, had no longer felt up to travelling the long way to Warsaw all on her own. So I had travelled to Berlin just to help her changing trains and accompany her the rest of the way. Back home, I let my sister know by e-mail that all went OK. but what I wrote was something along the lines of “Contact made succesfully. Target person delivered to agreed destination.”