On 2017-06-09 21:10:12 (+0100), Dominic Raferd <domi...@timedicer.co.uk> wrote:
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.
The rate-limiting may not be a big problem long-term but eventually all
email coming from you will be filed as spam. And then users will blame
you for that ...
Philip
--
Philip Paeps
Senior Reality Engineer
Ministry of Information
