I've got a Postfix server hosting a lastname.org domain name for family members.
I use virtual aliasing to forward inbound mail for family members to third-pary mail providers (mostly gmail, but a few yahoo and aol, too). I've also created user accounts on the server for a very small handful of immediate family members (4 people) so they can authenticate (via TLS) send email as firstn...@lastname.org (which is properly DKIM signed and will pass an SPF check). I do not provide any mail storage or retrieval on the server (no POP or IMAP) for any family members. This has worked fine for years, but now I'm starting to see warnings in the Postfix log from Gmail, stating that the server is being rate-limited because of unsolicited messages. I presume that Gmail is sensing SPAM being sent to the @lastname.org accounts, which gets forwarded to the family member's Gmail account. I don't do any spam checking or filtering on the Postfix server. So my questions are: 1) What's the best way to forward family members' incoming mail to Gmail (and other mailers)? 2) My Postscreen and main.cf sender restrictions are rejecting a fair amount of inbound spam, but apparently not enough to keep Gmail happy. 3) Should I consider setting up SpamAssassin with some very low thresholds to pick up the obvious stuff? Thanks in advance, Steve
