출처: Cloudflare Email Routing으로 이메일 주소를 손쉽게 만들고 라우팅하기
원본 헤더를 100% 보존시켜줍니다.
(포워딩 동작이 발생할때 클라우드플레어 DKIM 서명만 추가로 붙습니다)
보낼때는 각자 알아서 무료 SMTP 서비스를 활용하세요~
(Amazon SES / Mailgun / SendGrid / etc.)
(DKIM 서명 꼭 설정해두세요 평판 에 영향을 줍니다 이는 발신성공률과 연결됩니다)
위처럼 하시면 개인도메인을 가지고 계속 공짜로 메일을 쓰실 수 있습니다.
2022년 7월 1일 이후에도요~
(이 글은 실제로 테스트 후에 작성한 글임을 밝힙니다)
(개인적으로 전[doraji.xyz] 6$ 짜리 탄력요금제로 업그레이드 했습니다)
(전자메일 한통 한통마다 6$ 이상의 가치가 있기에…)
소여물 황병희 드림
[크롬OS 에서 적었어요~]
무료 SMTP 서버(서비스) 목록 참고문헌 기록으로 남겨봅니다 [^^^]:
[크롬OS 에서 적었어요~]
Subject: [mailop] Our experience on Gmail blacklisting our IPs range
Date: Tue Apr 5 12:28:41 CEST 2022
From: Cyril - ImprovMX <cyril@improvmx.com>
Hi everyone!
Two weeks ago, we had two ranges of IP blocked by GMail and since they are
a black box, we were in the dark about what would happen with the ban.
We made some progress since then and I wanted to share with you what
happened, what we did, and what resulted from it because it might help
others have their IP unblocked by Gmail.
About two weeks ago, we started receiving abuses reports because somehow
our emails were used as spam. At first, I thought they were occasional and
discarded them (we get a few from time to time), but they kept arriving,
and we had more and more reports every day (up to around 50 abuses reports
per day).
I started retracing the emails back (we add some headers that help us
identify the whole flow) and discovered that many reports were originating
from the same email. The abuse reports included a spamcop.net report with
the entire email (but with the destination recipient removed). My initial
assumption, then, was to believe that OVH (our hosting provider, sending us
the abuse reports) and/or Spamcop.net weren't checking for duplicates, and
someone sending many abuse reports from the same email triggered the
notifications, every time.
After a discussion with OVH about this potential issue, I discovered that
the problem was worst than that. By comparing all the emails from
Spamcop.net reports, I discovered that they were from a few emails, but
then, they had new headers added on top. This included a new "To",
"Subject" and "Date" header. An email sent 4 days ago was sent again, with
an updated date. The initial "Subject" was basic things like "hello" and
the new Subject added at the top was more spammy (the typical horny stuff).
Clearly, someone used the reputation of ImprovMX.com to deliver emails by
forging them before delivery.
It took us a few days to realize this whole situation, which caused our
domain and IP reputation to take a serious hit. As soon as we uncovered it,
we started blocking all the domains that were doing this. We also were able
to retrace other accounts created by the same user and blocked all the
domains. All of these domains were free ones (ending in .ml, .cf, .gq, .ga,
etc) so we also decided to stop accepting these domains.
But the harm was done, for 50% of all our IPs, Gmail stopped accepting them
and was returning "*Our system has detected that this message is likely
suspicious due to the very low reputation of the sending domain. To best
protect our users from spam, the message has been blocked*".
We started to panic.
We know that Gmail is impossible to reach out to, and we had absolutely no
idea if these IPs were blocked forever, or, if not, for how long.
The first thing we did was to stop running these IPs for a while.
We also went to this URL (
https://support.google.com/mail/contact/bulk_send_new) and submitted
everything we could, by being the most verbose possible.
And we waited...
We tried restarting the IP the next day, but they were still being refused
so we disabled them.
After around a week, we restarted the IP and they were accepted by Gmail!
We haven't received any responses from the form we submitted, nor from
anywhere else.
Our domain reputation is still in the "bad" from the Postmaster tool (
https://gmail.com/postmaster/) and we are trying to find ways to reverse it
(still haven't figured that one) but the IPs are now working again.
My key takeaway here in case your IPs are banned by Gmail is:
- First - and most importantly - find and stop the root cause of the
problem
- If you can, stop sending with these IPs (after fixing the issue,
otherwise you'll get your other IP listed too!)
- Reach out to Gmail via
https://support.google.com/mail/contact/bulk_send_new
- Try restarting your IP from time to time.
Someone working at Google told us that their Spam Ops were easily removing
the flags on the IPs when it was the first time, so if you get your IP
frequently blocked at Google, maybe this won't apply to you.
I hope this will help some of you. Being blocked by Gmail is hard, and
facing a black box makes it even harder. You don't know where to look, you
don't know what to do, you don't know who to reach out to.
My associate sent a message on this mailing list regarding our issue,
trying to have feedback on what to do and if someone else already faced
this, and we had some awesome help and feedback from people (thank you so
much) but the general feeling was clearly that Gmail is not on this world.
May your IPs stay out of DNSBLs.
Best,
Cyril
보시다시피, 무료 포워딩 서비스중 한곳에 Reputation 에 문제가 생겼습니다.
해당 서비스 회사는 지금 매우 위기를 맞고 있습니다.
Gmail 에서 해당 회사에서 (포워딩되어) 들어오는 메일들을 모두다 차단시키고 있다고 합니다.
\
From: Byron Lunz <byronlunz@gmail.com>
Date: Sat Apr 9 15:49:53 CEST 2022
Subject: [mailop] Best mailbox provider for personal domain?
Announcements about this from Google say that a "no cost option" will soon
be announced, so it probably makes sense to wait a bit longer to see what
that is. It *might* be a recommendation to move your domain to Google
Domains, where you can get up to 100 email addresses forwarded to your free
Gmail address. <https://support.google.com/domains/answer/3251241>
에 따르면,
자신의 도메인을 <<구글 도메인>> 레지스트라로 옮길경우,
무료로 포워딩 메일 (개인 Gmail함으로의 포워딩) 을 제공한다고 합니다.
이게 시사하는 중요한 쟁점이 있습니다.
지금 현재 무료 포워딩을 제공한다고 나선 업체들이 거의 모두다
Reputation 점수가 깍여서 서비스가 원활치 않습니다.
예외업체는 <<클라우드플레어>>뿐입니다.
상황이 이럴진데, 개인도메인을 계속 무료로 쓰려고 한다고 가정할때,
포워딩 자체가 일단 안정적이어야 합니다.
그래서 이 구글 도메인 에서 포워딩은 공짜로 제공한다니 이건 반가운 소식이
분명하구요, 구글이 현재 지구상에서 가장 안정적인 수발신/포워딩 서비스 업체입니다.
아마 보내는 메일도 구글아웃본드 통해 가능할걸로 추측됩니다.
아직 테스트 해보진 않았습니다.
(전 테스트가 의미없는게 구글 워크스페이스 6$ 짜리 유료 사용자입니다.)
정리하면 <<구글 도메인>> 으로 레지스트라 를 옮깁니다.
그럼 공짜로 포워딩 쓸 수 있고 공짜로 구글 아웃본드도 얻을 수 있씁니다.
개인 Gmail 함에서 평소 하던대로 업무메일/개인메일 다 쓸 수 있다는 말이지요~
위에껀 내가 Postfix 로 힘들게 메일서버를 설치하지 않고
개인도메인을 계속 공짜로 쓸 수 있는 방법론을 이야기합니다.
출처는 mailop.org 입니다.
가입된 사용자만 메일링 글타래를 열어볼 수 있씁니다.
[크롬북에서 적었어요~]
구글 워크스페이스 가격이 궁금한분들을 위하야
저의것을 공유 차원에서 올려봅니다.
가치 판단에서 쉽사리 결정을 못하실 분들을 위한
참고자료입니다.
https://gitlab.com/soyeomul/Gnus/-/commit/924a06f1603f5eace4ef18b3997d690b4c16a418
황병희 드림
[데비안 11 ibus-hangul 에서 적었어요~]
출처: https://www.clien.net/service/board/news/17258803
구글이 고심끝에 무료판을 유지하기로 했다고 합니다.
6월 27일까지
“나 계속 무료판 쓸께요” 라고 말해야 한답니다.
출처는 위에 적어두었습니다. 클리앙 새소식.
[데비안 11 이맥스에서 적었어요~]