Microsoft:
Microsoft support page where this address comes from.
Google:
https://support.google.com/mail/contact/abuse?hl=en
Other providers:
Usually send email with the headers and abusive content to abuse@ their domain name.
Microsoft:
Microsoft support page where this address comes from.
Google:
https://support.google.com/mail/contact/abuse?hl=en
Other providers:
Usually send email with the headers and abusive content to abuse@ their domain name.