I have already got a few times the hint to post some things on the mailing list but this seems to not so easy. Because of this I'm opening this help request here. After looking on the website I was able to successfully subscribe to the linux-pci mailing list. I have also send the help command to majordomo@vger.kernel.org but I haven't found a topic how to post to the mailing list. Maybe somebody can help me what to do for example if I want to make a feature request for pciutils on the linux-pci mailing list.
Send mail to linux-pci@vger.kernel.org for the linux-pci list (and likewise linux-whatever@vger.kernel.org for others)
My mails are considered as spam even on pre-writing on a text editor without formatting and pasting the content into the mail. I'm assuming my provider is appending something that includes HTML which causes this behavior. This makes it really difficult to post something on the mailing list.