I constantly get Recipient address rejected: Greylisted for 60 seconds; if I send an email to the mailing list from merlin.infradead.org and bombadil.infradead.org
and for sure 60 seconds has passed since the first try
or this could be the true problem ? Could not complete sender verify callout
yahoo,gmail and other private servers are accepting the mail from this account !
You need to register. Did you register? If not, then the greylisting is indeed misleading.
Edit: boy, old post...
they fixed it sometimes