On 9 June 2017 at 20:45, Steve Jenkins <st...@stevejenkins.com> wrote:
> 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? > I have a not-dissimilar setup and I have various fixes to minimise Gmail's upset. But I guess the first q is whether you need to be worried about the 'rate-limited' messages. If you have a low volume of incoming emails anyway a bit of rate-limiting is hardly likely to be a problem.
