We just released a new patch which fixes an important federation problem. Due to a mistake in the code, activities were only sent out once, even if delivery failed (e.g. because the target instance is down, or a temporary connection issue). Instance admins should definitely upgrade.
This problem is fixed, so that failed deliveries are retried up to 9 times, with exponentionally increasing intervals. The only limitation now is that it will not keep retrying after Lemmy is restarted, but that case should be less common.
Yeah, according to logs the POST requests are going through fine.
To Action From -- ------ ---- 22/tcp ALLOW IN Anywhere 80/tcp ALLOW IN Anywhere 443 ALLOW IN Anywhere 25 DENY IN Anywhere 443/tcp ALLOW IN Anywhere 22/tcp (v6) ALLOW IN Anywhere (v6) 80/tcp (v6) ALLOW IN Anywhere (v6) 443 (v6) ALLOW IN Anywhere (v6) 25 (v6) DENY IN Anywhere (v6) 443/tcp (v6) ALLOW IN Anywhere (v6) 443 ALLOW OUT Anywhere 443 (v6) ALLOW OUT Anywhere (v6)