[OT] looking for a good mobile MUA

2020-03-21 Thread Wesley Peng
Hello On desktop I always use Thunderbird for MUA. Thunderbird is clean and lite, handling protocol well. But for mobile (I primarily use iOS), I couldn't find a good MUA to use. I tried almost every release on appStore (outlook, edison, bluemail, spark, mymail...), they are either too compli

should we use plaintext for message?

2020-03-17 Thread Wesley Peng
Hello Following this guide: https://useplaintext.email/ Shall we use plaintext message in regular email communication? Thanks

Re: Postfix stable release 3.5.0

2020-03-17 Thread Wesley Peng
Nice work on the release. Thanks Wietse. Mar 17, 2020, 21:39 by emaw...@gmail.com: > Hello! excellent work, the option to bounce emails manually is very useful > for me. > > Never perform the update through the source code. I would like to know if I > can get the src.rpm for Centos? > > > > El

Re: postfix for IoT

2020-01-20 Thread Wesley Peng
this mail sending feature? Thanks. On Mon, Jan 20, 2020 at 8:06 PM Mauricio Tavares wrote: > On Sun, Jan 19, 2020 at 7:40 PM Wesley Peng wrote: > > > > How to compile postfix into the Embedded operating system (such as the > home router) and make it as a mail gateway for Sma

postfix for IoT

2020-01-19 Thread Wesley Peng
How to compile postfix into the Embedded operating system (such as the home router) and make it as a mail gateway for Smart home appliances? Thank you.

ISP open relay

2020-01-12 Thread Wesley Peng
Hello My ISP email even doesn’t require SMTP AUTH. Will they be acting as open relay? How to stop abuse of outgoing mail? Regards

Question on catch all domains

2019-12-03 Thread Wesley Peng
Hi I have a question needing your help. I have a few domains, every domain has a contact email. How to configure postfix to accept every domain and every email on domain, and deliver them to a specific mailbox? I meant, I don’t want to add the virtual domain one by one in postfix, but like t

Re: Postfix stable release 3.4.8

2019-11-27 Thread Wesley Peng
Hi Wietse on 2019/11/27 23:38, Wietse Venema wrote: [An on-line version of this announcement will be available at http://www.postfix.org/announcements/postfix-3.4.8.html] Fixed in Postfix 3.4: It's really nice to see postfix gets continuous development for these many years. Wish it becomes m

Re: question on a SPF setting

2019-11-27 Thread Wesley Peng
Thanks. While I am still not clear about what the description in mxtoolbox. Can you give more details? regards. on 2019/11/27 16:08, patpro wrote: On 2019-11-27 08:15, Wesley Peng wrote: Hello I saw myrambler.ru has a special setting for SPF: myrambler.ru.   3599    IN  TXT

question on a SPF setting

2019-11-26 Thread Wesley Peng
Hello I saw myrambler.ru has a special setting for SPF: myrambler.ru. 3599IN TXT "v=spf1 ip4:81.19.78.96/27 ip4:81.19.78.0/27 ip4:81.19.88.0/24 -exists:%{ir}.spf.rambler.ru ~all" what does it mean for this part: -exists:%{ir}.spf.rambler.ru Thank you.

Re: Forwarding mail without breaking SPF?

2019-11-26 Thread Wesley Peng
Hello on 2019/11/27 12:20, Richard Damon wrote: DMARC/SPF, which only validates to the From: header will break. If the sender domain set up SPF to: v=spf1 ip4:0.0.0.0/0 ~all Will this pass through any SPF check? regards.

Re: Reject Chinese mail

2019-11-26 Thread Wesley Peng
on 2019/11/27 10:00, 황병희 wrote: Personally i read public mailing lists' messages by Gmane. There is example screenshot [0]. So i have no problem about that. For customized spam policy, I found Tuffmail has a flexible interface. Regards.

Re: how to setup a privacy oriented mailserver

2019-11-26 Thread Wesley Peng
Hi on 2019/11/26 20:53, Jaroslaw Rafa wrote: Sending mail out of a MTA is always on port 25. STARTTLS is used if possible. If using plain port 25, the messages are not secure enough for traffic. From what I know there is a technology calling Traffic hijacking. Regards.

Re: how to setup a privacy oriented mailserver

2019-11-26 Thread Wesley Peng
Hi on 2019/11/26 19:27, Matus UHLAR - fantomas wrote: ...and there's no "starttls" on 465, that's what I meant "implicit". while port 465 was assigned for SMTPS in January 2018, it's been used this way on many sites/services for years (even decades) How the traffic between big one's MTAs get

Re: how to setup a privacy oriented mailserver

2019-11-26 Thread Wesley Peng
on 2019/11/26 17:02, Matus UHLAR - fantomas wrote: I would set up port 465 also. Note that TLS on 465 is implicit, while on 587 is explicit, so it's easier to allow unencrypted connections by a mistake on 587. 587 is also used for StartTLS, am I right? regards.

Re: how to setup a privacy oriented mailserver

2019-11-25 Thread Wesley Peng
That look interesting. Do you provide a hosting plan Andre? regards on 2019/11/26 14:31, André Rodier wrote: Hello, Bill. I had the same concern a few years ago. I have been self-hosting for more than a decade, and more recently, I built this: https://github.com/progmaticltd/homebox This is

Re: how to setup a privacy oriented mailserver

2019-11-25 Thread Wesley Peng
Hi on 2019/11/26 10:22, lists wrote: At a minimum, I would set it up to use port 587. Then block via firewall all the email ports other than port 25 all countries from which you will not be using the server. Keep the attack surface small. For example don't provide for web based email. Sorr

how to setup a privacy oriented mailserver

2019-11-25 Thread Wesley Peng
Hi community, I finally got a domain from registrar, if I want to run a privacy oriented mail server, what steps should I take? For example, setup SSL over all, SPF, DKIM, DMARC, DNSSec, DoH, encrypted storage, app special pasword, secondary authentication? Is there any guide for it? Thank

Re: Validation DMARC

2019-11-24 Thread Wesley Peng
That's great explation. Thanks Richard. On Mon, Nov 25, 2019, at 7:33 AM, Richard Damon wrote: > On 11/24/19 6:21 PM, Wesley Peng wrote: > > Why it doesn’t break From: header SPF? Just curious > > > > On Mon, Nov 25, 2019, at 4:12 AM, Chris Wedgwood wrote: > >>

Re: Validation DMARC

2019-11-24 Thread Wesley Peng
Why it doesn’t break From: header SPF? Just curious On Mon, Nov 25, 2019, at 4:12 AM, Chris Wedgwood wrote: > > Or in short: DMARC intentionally breaks every mailinglist and every > > mail-forwarding. So, if a mail-provider uses a strict DMARC-policy, > > it effectively says: "Our mail-addresses

Re: Reject Chinese mail

2019-11-23 Thread Wesley Peng
Or maybe block them by ESP? I saw there is a Perl module listing those big providers in China. https://metacpan.org/pod/Data::ChineseESP regards On Sat, Nov 23, 2019, at 7:33 PM, Rafael Azevedo wrote: > I've blocked the entire ASIA netblocks in my ASN. > We don't exchange any information with

Re: Validation DMARC

2019-11-23 Thread Wesley Peng
I’m not sure , you may refer this discussion, https://serverfault.com/questions/779730/why-dont-my-domains-messages-to-a-google-group-get-their-headers-rewritten-so On Sat, Nov 23, 2019, at 7:23 PM, Jaroslaw Rafa wrote: > Dnia 23.11.2019 o godz. 19:10:51 Wesley Peng pisze: > > > &

Re: Reject Chinese mail

2019-11-23 Thread Wesley Peng
I totally agreed with you @Rafa. btw, is there any good reputation, strict standard email hosting for suggestions? I currently use fastmail, it is good for personal usage, but I heard some privacy problems for commercial use. thanks. On Sat, Nov 23, 2019, at 6:35 PM, Jaroslaw Rafa wrote: > Dn

Re: Validation DMARC

2019-11-23 Thread Wesley Peng
Hello if you have used a mail.ru email for google groups, when you posted message to group, it will replace From header with the list address. On Sat, Nov 23, 2019, at 6:43 PM, Jaroslaw Rafa wrote: > Dnia 23.11.2019 o godz. 17:19:53 Wesley Peng pisze: > > Google groups replace the f

Re: Validation DMARC

2019-11-23 Thread Wesley Peng
Google groups replace the from: with their group address. What I know the big providers having strict DMARC setting are: mail.ru laposte.net I am glad the more large providers like gmail, outlook don’t have this stupid setting. Regards On Sat, Nov 23, 2019, at 5:13 PM, Roland Köbler wrote: >

Re: Question about DMARC

2019-11-22 Thread Wesley Peng
Thanks for helps. On Sat, Nov 23, 2019, at 11:07 AM, Richard Damon wrote: > On 11/22/19 6:25 AM, Wesley Peng wrote: > > Would this list break SPF then? Thanks > > > This list sends with an envelope sender in the lists domain, so it > doesn't break general SPF, it will b

Validation DMARC

2019-11-22 Thread Wesley Peng
Hi when validating DMARC, it use the envelop address, or use from address from the header? Thanks

Re: Reject Chinese mail

2019-11-22 Thread Wesley Peng
SA (Spamassassin) is good idea, I saw most people running their own mail servers are using it. On Sat, Nov 23, 2019, at 4:35 AM, Ralph Seichter wrote: > * merr...@fn.de: > > > We did get a lot of spam messages from Chinese providers. We speak not > > Chinese, do you think if it is possible to r

Re: Question about DMARC

2019-11-22 Thread Wesley Peng
Would this list break SPF then? Thanks On Fri, Nov 22, 2019, at 7:15 PM, Richard Damon wrote: > On 11/21/19 11:47 PM, Wesley Peng wrote: > > Richard Damon wrote: > >> That is a question to ask them. Basically the strict DMARC policy is > >> designed for transactional

Re: Question about DMARC

2019-11-22 Thread Wesley Peng
I meant I didn’t get it in my mail.ru inbox. The other providers may or may not reject it. Thanks. On Fri, Nov 22, 2019, at 5:52 PM, Wesley Peng wrote: > Hi > > the mail I sent from mail.ru to this list got dropped, I didn’t get the > message I sent. > > > On Fri, Nov

Re: Question about DMARC

2019-11-22 Thread Wesley Peng
Hi the mail I sent from mail.ru to this list got dropped, I didn’t get the message I sent. On Fri, Nov 22, 2019, at 4:41 PM, Nick wrote: > On 2019-11-22 04:21 GMT, Wesley Peng wrote: > > The email I am using is with domain of mail.ru, which has the > > strictest DMARC

Re: Question about DMARC

2019-11-21 Thread Wesley Peng
Richard Damon wrote: The side effect of it is that addresses on such a domain really shouldn't be used on mailing lists, Thanks for pointing out this. I never knew it. Now I changed my mail to fastmail account, which I owned it for many years. I just don't like its mobile app, it's just a

Re: Question about DMARC

2019-11-21 Thread Wesley Peng
Richard Damon wrote: That is a question to ask them. Basically the strict DMARC policy is designed for transactional email, where spoofing is a real danger. The side effect of it is that addresses on such a domain really shouldn't be used on mailing lists, or any other 3rd party senders not speci

Re: Question about DMARC

2019-11-21 Thread Wesley Peng
Richard Damon wrote: The typical options for the mailing list are 1) Just not allow people from such domains to post to the list (the reject option you mention) 2) Rewrite the from address from people from such a domain to be from the domain of the list (often the list address). This is arguabl

Question about DMARC

2019-11-21 Thread Wesley Peng
Greetings, When mail is relayed through mailing list, why the DMARC policy is possible to reject? For example, I sent mail from x...@mail.ru to y...@googlegroups.com Since mail.ru has the strictest DMARC policy, the recepients may choose to reject this mail which is relayed by googlegroups,

the strictest antispam laws?

2019-11-21 Thread Wesley Peng
Hello I saw a trend that, every ESP has taken hard work on antispam policy. For example, from my test cases: 1. gmail totally can't be registered from PC, only mobile client (gmail, outlook etc) can sign up a new username. they require mobile verification in the process. 2. yahoo totally can

Re: Replace semicolon in recipient list

2019-10-23 Thread Wesley Peng
on 2019/10/23 16:48, luc...@dds.nl wrote: So, you could rewrite the "To:" list into "," separated. That sounds like what I am looking for, thanks! How do I do that? I did not get it to work with a REPLACE in the header_checks... I saw postfix has a address rewrite guide you may want to ch

Re: Replace semicolon in recipient list

2019-10-23 Thread Wesley Peng
on 2019/10/23 16:40, luc...@dds.nl wrote: I was just curious, why the From addr is a list of addresses? Isn't from just a single address? My bad - I meant to say the "To:" header! So, you could rewrite the "To:" list into "," separated. regards.

Re: Replace semicolon in recipient list

2019-10-23 Thread Wesley Peng
Hi on 2019/10/23 16:27, luc...@dds.nl wrote: One sending application is sending mail with a From: header containing a semicolon-separated list of addresses. This is not according to the standard (https://tools.ietf.org/html/rfc2822#section-3.6.3) and is rejected by SES: I was just curious, w

about MX hosts

2019-10-22 Thread Wesley Peng
Hello I saw my ESP has two MX records pointing to just the same host. rambler.ru. 21 IN MX 5 inmx.rambler.ru. rambler.ru. 21 IN MX 10 inmx.rambler.ru. Does this have any value inprovement? Thanks

Re: base64 encoded emails

2019-10-17 Thread Wesley Peng
Hi on 2019/10/17 16:48, Fourhundred Thecat wrote: I believe email should be plaintext. I don't like HTML emails either. If somebody feels that his message needs fancy formatting, he should send it as pdf attachment. But emails should stay plaintext. non-latin message body should be encoded for

how to get statistics about inbout/outbound messages

2019-10-11 Thread Wesley Peng
As the subject stated, how can I get the statistics on the numbers of inbout/outbound messages every day from Postfix? Thanks & regards.

Re: How to block mail coming from a domain

2019-09-26 Thread Wesley Peng
on 2019/9/26 16:42, Enrico Morelli wrote: Can you setup spamassassin for domain blacklist? regards. How can do that? The SpamAssassin whitelist and blacklist options can include globs, not regular expressions. The valid metacharacters are ? and * to match 0-1 or 0-many characters respect

Re: How to block mail coming from a domain

2019-09-26 Thread Wesley Peng
on 2019/9/26 16:34, Enrico Morelli wrote: I tried to put .monster or *.monster in sender_access but doesn't work. Is there a way to block *.monster mails? Can you setup spamassassin for domain blacklist? regards.

[OT] why ATT.net still host its email on Verizon Yahoo

2019-09-17 Thread Wesley Peng
Hello, though this is a little OT, but I was curious since verizon has bought yahoo for long days, why ATT still host its customer email accounts on yahoo platform? we know ATT and verizon are commercial competitors. Thanks for any comments.

Re: Refuse mail from hosts with closed port 25

2019-09-16 Thread Wesley Peng
Hi on 2019/9/16 20:47, Paul van der Vlis wrote: How can I refuse mail from hosts who don't have an open port 25? What do you think from such a check? You shouldn't. Many email systems have delivery agent and MTA to be separated. That's to say, they get incoming mails from MTA which has port

Re: Change status code for "Host not found"

2019-09-16 Thread Wesley Peng
Hi on 2019/9/12 22:01, Helmut Schneider wrote: relay=none, delay=0.09, delays=0.06/0.02/0.01/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=EXCHANGE01 type=: Host not found) This is a network issue rather than postfix problem I may think. You shoul

issues with MTA's timestamp

2019-09-06 Thread Wesley Peng
Hello, I found if peer MTA's timestamp is too much different from my end, the messages may not be displayed. for example, when you try to sign up to apache projects' mailing list, like one of this page: https://flink.apache.org/community.html The response message's (for user to confirm) ti

username specification for email system

2019-09-05 Thread Wesley Peng
Hello, Is there the username specification for email system? It seems most special characters like ".", "-", "+", "_", "#", "$" are permitted in the username part. And even ___username...@domain.com is right (like my sender account). So I was confused. Thanks.

Re: deal with google mailboxes

2019-09-04 Thread Wesley Peng
viktor, on 2019/9/4 20:09, Viktor Dukhovni wrote: Perhaps, but Postfix is not a list manager. Postfix just delivers email to the addresses in the message envelope. If some list servers restrict posts to subscribers, any logic to treat addresses as equivalent would be in the list server, not P

Re: deal with google mailboxes

2019-09-04 Thread Wesley Peng
Hello on 2019/9/4 19:08, Wietse Venema wrote: To signal domain equivalence, the receiver should use CNAME records or some other explicit mechanism. from what I know, MX host should not be CNAME records in DNS zone. regards.

deal with google mailboxes

2019-09-04 Thread Wesley Peng
Hello, As a mailing list server, how does postfix deal with google's mailbox formats? for exmaple, all mailboxes below are indeed the same one: usern...@gmail.com user.n...@gmail.com usernam...@gmail.com usern...@googlemail.com Can list server know them and treat them as just one? Thanks.

Re: Postfix MX resolving issue on a chrooted setup

2019-08-31 Thread Wesley Peng
Maybe UDP is filtered in chroot environment. Can you try to capture the network flow? Jean-Philippe Méthot 于2019年8月31日 周六上午2:08写道: > Hi, > > I’ve been trying to setup postfix 3.4.6 (ghettoforge.org package) with > dovecot, mailscanner and the mailwatch frontend on a centos 7 (cloudlinux > 7.6) s

Re: about MTA's 4xx response code

2019-08-29 Thread Wesley Peng
on 2019/8/29 16:50, @lbutlr wrote: Only if you were very careful monitor your system for the many many corporate sanders where greylist was the effective equivalent of a blacklist (those that did not retry in violation of RFCs and this that had many servers and would resend from different o