[LAD] Posting troubles

Hi, I'm having troubles posting to the list. Hopefully this mail will make it through but I can never be sure. Switching SMTP server sometimes help, sometimes not. Some days it works, some days it doesn't. Yesterday, I tried several times to answer to Geoff on the "pulsating noises" thread, but it didn't work. So that Ralf (who was in CC) answered my post before mine arrived, which eventually found its way to the list today. Here's the error I always get: <linux-audio-dev(a)lists.linuxaudio.org>rg>: host a.mx.lists.linuxaudio.org[198.82.152.114] said: 550 5.7.1 <linux-audio-dev(a)lists.linuxaudio.org>rg>: Recipient address rejected: Mail appeared to be SPAM or forged. Ask your Mail/DNS-Administrator to correct HELO and DNS MX settings or to get removed from DNSBLs; please relay via your ISP (samalyse.com) (in reply to RCPT TO command) I'm participating to a rather important number of lists, and LAD is the only place where I have this problem (dunno about LAU and LAA, since I haven't posted there for a while). Also, it never happens in all my other personal mails. -- Olivier