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Why may be gmail blocking my email mid conversation ?
I have been emailing back and forth with the teacher at my daughter's school and she requested some information about week ago, I went to send it tonight and Gmail has bounced my response with Our system has detected that this message is 550-5.7.1 likely unsolicited mail.
Its the same email address I have been using, the IP of smtp relay (my work's server) is in my personal domain's SPF and I did not do any changes in the last 12 months or more. Checked my work's server IP on MX toolbox BL check and its all green. I have had that work server's IP (LunaNode) for at least last 3 years and both domains - work and personal - for 10+ years and I never sent any bulk emails.
Comments
UPDATE: so I did couple more tests: http://mail-blacklist-checker.online-domain-tools.com/, https://whatismyipaddress.com/blacklist-check and its all coming green except rbl.rbldns.ru which says its listed (???)
Sent that email from my work email, which is hosted on exact same server and it seems to get through, nothing came back. Btw. there may be spam with spoofing outgoing address using my personal and work emails, but SPF test should take care of that and afaik my server has not been breached.
Also have Gmail address, so I tried to send test email to my own Gmail address from the "bad" personal address and it went through. Mystery
https://support.google.com/?hl=en
In my experience, email providers randomly block IPs and the procedure to become a "good" sender varies greatly. Each provider has their own blacklist, so there is little point in trying to please them all. All large providers are on a blacklist somewhere, because unknowing admins confuse "a lot of spam from a network with lots of servers" with "a high rate of spam".
I resorted to adding a relay for recipient domains that block my email for whatever reason. It takes 1 click and costs neither time, nor money (e.g. mailjet free account).
Can you post the original header from the bounce email?
Sys Oompa Loompa
I can post it with some modifications. Thanks for any insights, Google has not been very helpful so far.
That's a content filter. They have another message for "we're tired of your IP right now, try again later." Content triggering it could be anything. They won't tell you what it is. Could be a header. Could be that they don't like your domain name. Could be an HTML signature. Could even be a domain or IP that you're mentioning somewhere in the email.
I encountered it before due to misconfiguration. Check:
noanonymous
is enabled insmtpd_sasl_security_options
in/etc/postfix/main.cf
/etc/postfix/main.cf
smtpd_tls = yes
in/etc/postfix/main.cf
[email protected]
to see the result of spf, dkim etcSure, if NSA finds your conversation not according to their standards google will block it. And yes, your are interesting to NSA
I don't think you understand how Intelligence gathering works. Or censorship.
He doesn't, he may still working off theory that people listen to convos on the phone, or look at your emails. Hate to burst his bubble they don't.