[pfx] Can postfix/spamassassin save blocked messages ?

We have mail coming from one of our servers that gets a spam score of 8 and gets blocked. Is it possible to tweak the configuration of postfix and/or spamassassin to save the blocked messages for debugging/troubleshooting purpuses ? Thanks. ___

[pfx] Mailing list is being Spam Filtered by O-365

Is there any chance that SPF and DKIM records could be added to appear in the headers ? The gubba-mint folks are getting extremely medieval about email security. ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an

[pfx] Re: A new Postfix book in the making - "Run Your Own Mail Server"

Thank you for the news. Any previews or samples available to view ? If so, links, please. From: Ralf Hildebrandt via Postfix-users Reply-To: "postfix-users@postfix.org" , Ralf Hildebrandt Date: Friday, March 17, 2023 at 06:53 To: "postfix-users@postfix.org" Subject: [EXTERNAL] [pfx] Re: A new

Re: [EXTERNAL] Mail queue took 3 hours to recover from a flood. Suggestions ?

uggestions ? On 23 Jan 2023, at 18:30, White, Daniel E. (GSFC-770.0)[AEGIS] mailto:daniel.e.wh...@nasa.gov>> wrote: “replace Amavis with something faster” Any suggestions ? Start by tuning amavis, see the end of https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.i

Re: [EXTERNAL] Re: Mail queue took 3 hours to recover from a flood. Suggestions ?

recover from a flood. Suggestions ? On Mon, Jan 23, 2023 at 05:06:34PM +0000, White, Daniel E. (GSFC-770.0)[AEGIS] wrote: There was no outage. The queue filled faster than the processes could process them through. I do not know which limit to increase to accommodate such bursts of traffic. I did find 27 ins

Re: [EXTERNAL] Re: Mail queue took 3 hours to recover from a flood. Suggestions ?

E. (GSFC-770.0)[AEGIS]: Around 12000 messages. The queue went from ~3000 to over 12000 in about 30 minutes and then took 3 hours to grind through all of them. I am still trying to determine if this was an accident or not. The source claims it was not intentionally malicious. Some postconf values

Mail queue took 3 hours to recover from a flood. Suggestions ?

Around 12000 messages. The queue went from ~3000 to over 12000 in about 30 minutes and then took 3 hours to grind through all of them. I am still trying to determine if this was an accident or not. The source claims it was not intentionally malicious. Some postconf values:

Re: [EXTERNAL] Re: MX records and relayhost: Am I going this correctly ?

: (240) 513-5290 From: on behalf of Wietse Venema Reply-To: Postfix users Date: Wednesday, October 26, 2022 at 15:38 To: Postfix users Subject: Re: [EXTERNAL] Re: MX records and relayhost: Am I going this correctly ? White, Daniel E. (GSFC-770.0)[AEGIS]: Many thanks for the sanity check, Mr. P

Re: [EXTERNAL] Re: MX records and relayhost: Am I going this correctly ?

thanks for the quick response From: on behalf of Wietse Venema Reply-To: Postfix users Date: Wednesday, October 26, 2022 at 14:09 To: Postfix users Subject: [EXTERNAL] Re: MX records and relayhost: Am I going this correctly ? White, Daniel E. (GSFC-770.0)[AEGIS]: MX Records

MX records and relayhost: Am I going this correctly ?

MX Records: mydomain.tld. 33 IN MX 10 relay-1.mydomain.tld. mydomain.tld. 33 IN MX 20 relay-2.mydomain.tld. with relay-1 and relay-2 having appropriate A and PTR records. Then in /etc/postfix/main.cf, I have relayhost = mydomain.tld I

Customer getting timeouts - traffic not showing on relays

A customer sent 6 test messages in a space of about 30 minutes. 5 out of 6 never appeared in the maillogs of 3 different relays I am still trying to get more detail from them. The one that did go through showed, IMHO, strange behavior: 2022-08-05T17:27:37.326857+00:00 MAILRELAY

SOLVED!!: How can I set a "Reply-To" header ?

y-To" header ? White, Daniel E. (GSFC-770.0)[AEGIS]: I found out how to do it from command line: echo -e "Testing Mail\nThank you" | mailx -v -s "Testing Mail" -S "reply-to=yom...@example.com<mailto:yom...@example.com>" m...@example.com<mailto:

Re: How can I set a "Reply-To" header ?

I will try the Postfix built-in header_checks – PREPEND I will also post my results. Thank you for the details. From: on behalf of Wietse Venema Reply-To: Postfix users Date: Thursday, June 30, 2022 at 09:53 To: Postfix users Subject: Re: How can I set a "Reply-To" header ? White

How can I set a "Reply-To" header ?

I found out how to do it from command line: echo -e "Testing Mail\nThank you" | mailx -v -s "Testing Mail" -S "reply-to=yom...@example.com" m...@example.com Is there a way to add a “Reply-To” header from the Postfix configuration ? I looked in the documentation but

Re: [EXTERNAL] Re: Sanity Check Request: smtpd_*_restrictions

Allow connections from trusted networks only. >smtpd_client_restrictions = permit_mynetworks, reject On 17.05.22 15:46, White, Daniel E. (GSFC-770.0)[AEGIS] wrote: >I only permit incoming mail from known, upstream relays which will be in "mynetworks" >Do you s

Re: Sanity Check Request: smtpd_*_restrictions

__ Daniel E. White daniel.e.wh...@nasa.gov NASCOM Linux Engineer NASA Goddard Space Flight Center Office: (301) 286-6919 Mobile: (240) 513-5290 On 5/17/22, 11:25, "owner-postfix-us...@postfix.org on behalf of Matus UHLAR - fantomas" wrote:

Sanity Check Request: smtpd_*_restrictions

This is part of what I plan to put on our new MTA (Postfix only) and MDA (Postfix/Dovecot) servers. Please tell me if I am doing anything foolish / dangerous. My concern is whether I should put "permit_mynetworks" higher in the sender and recipient restrictions. smtpd_client_restrictions =