First, email messages sent by the trac ticket system require moderator approval. This didn't used to happen, but I don't remember when this started. As the moderator, I respond and the message is sent. That's not great, but I don't mind it because there are very few tickets.
However, within the last month or two, when I respond to the moderator message, I get a bounce saying the email couldn't be delivered to the reply address. It's something like
cmucl-ticket+moderate-2b6c59a112760eb7@common-lisp.net, where the hex digits change with each message. This didn't used to happen.
The ticket message is, however, successfully sent.
These are just minor annoyances that didn't used to happen.
Ray