Re: Stopping backscatter spam to a specific domain

ldap you can query that to check if the recipient address is valid or not. Hope this helps ;-) Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: Stopping backscatter spam to a specific domain

de by asking any backend for verification. I think this can be achieved with reject_unverified_recipient to query dovecot via lmtp but I've no practical experience with this. Probably you've to do some googling... Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since

Re: postfix vpn problem

so no malware can forward internet traffic through a vpn into a company network. I propose to investigate further into this direction. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: postfix vpn problem

tead of checking postfix. A quick hack solution could be to put an entry for smtp.gmail.com in your /etc/hosts file. But be aware that this hack breaks the day when gmail moves their server to another ip address. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: https://www.postfix.org/ in trouble

Mojn, Today I find only a directory listing at www.postfix.org or www.postfix.com With http it's working. With https I get a certificate warning (issued for archive.science.uu.nl) and a directory listing. So might be a regional problem? Groetjes Claus -- Claus R. Wickinghoff,

Re: https://www.postfix.org/ in trouble

against (like the actual setup with the provider) it's still ok and working and safe. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: password security

Hi, do you know how to stop passwords from being brute-forced for a mailserver? do you have any practical guide? fail2ban is a proper solution on Linux machines against brute force login attempts. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still

Re: Can't finish installation, need help

be default behavior in Debian. master.cf is also the right place to enable submission, i.e. bind to port 587. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: Can't finish installation, need help

Hi Viktor, thanks for clarification. I'll modify my setup here accordingly. Groetjes Claus Am 21.06.22 um 23:13 schrieb Viktor Dukhovni: On Tue, Jun 21, 2022 at 10:42:33PM +0200, Claus R. Wickinghoff wrote: > smtpd_tls_cert_file=/etc/letsencrypt/live/mydomain.net/fullc

Re: configuration postscreen

Hi Wietse, So for me it still makes sense to combine postscreen with postgrey, as postscreen works mainly on ip addresses (their reputation in fact) while postgrey also takes care on sender's and recipient's e-mail addresses. By design, postscreen does not know the sender or recipient. In pa

Re: Disable function "said: 550 Blocked by SPF () (in reply to MAIL FROM command))"

onses.com. 900 IN TXT "v=spf1 ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:76.223.176.0/24 ip4:76.223.180.0/23 ip4:76.223.188.0/24 ip4:76.223.189.0/24 ip4:76.223.190.0/24 -all" [...] Is your postfix running with any of these ips? Groetjes Claus --

Re: easy way to forward all root mail to devnull?

Hi, Is there easy way to forward all root mail to devnull? In /etc/alias: root: /dev/null (and afterwards on Debian you have to run newaliases. Might be similar on other distros) Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: The historical roots of our computer terms

ic lights are pretty international. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-)

Re: Multiple server for one domain

s that you can easily install and maintain all filter stuff (anti-virus, anti-spam, e-mail-archive) at the central system, as any e-mail has to pass by here. I hope you'll get the idea :-) Otherwise please feel free to ask. Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using L

Re: Multiple server for one domain

l the aliases, makes the routing decisions and can probably filter if needed. The central server is the only one to receive and send to the outside world. Another bonus here: Only one place with a logfile to search for lost communication. Groetjes Claus -- -- Claus R. Wickinghoff, Dipl.-Ing.

[P-U] Re: Poster Name not visible in Thunderbird

Hi, Any workarounds in Thunderbird to override this behavior? here it's working as expected and I did not change anything (Thunderbird 102.8.0 (64-Bit) on Debian). Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still

[pfx] Re: Can't connect to www.postfix.org

? Groetjes Claus -- Claus R. Wickinghoff, Dipl.-Ing. using Linux since 1994 and still happy... :-) ___ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org