Re: repeated connect and disconnect

2020-10-08 Thread Viktor Dukhovni
On Wed, Oct 07, 2020 at 08:02:02PM -0700, li...@lazygranch.com wrote: > Is there something I should be doing to mitigate this problem? > > Oct 8 02:11:42 myserver postfix/smtpd[11630]: connect from > unknown[180.123.163.212] Were you expecting email from the below network? If not, you don't n

Re: Reverse smtpd_sender_login_maps

2020-10-08 Thread Tom Sommer
On 2020-10-07 16:28, Dominic Raferd wrote: On Wed, 7 Oct 2020 at 14:04, Vieri Di Paola wrote: On Wed, Oct 7, 2020 at 2:34 PM Tom Sommer wrote: > > So SASL user "t...@example.com" would be able to send only from > "@example.com". This would force sasl-authed user "me" to only send from m

Re: Sender restriction to reject message with multiple from addresses

2020-10-08 Thread Tom Hendrikx
On 07-10-2020 02:27, Pau Peris wrote: I'm hosting my dad's webpage which has a contact form (which should be improved to avoid spam and/or bots) and from time to time someone types multiple email addresses in the from field of the form so contact emails with multiple from addresses like "from: h.

Re: sender dependent relay host problem

2020-10-08 Thread Marko Horn
hello wietse, --- Mitten drin statt nur Datei! Am 2020-10-01 00:06, schrieb Wietse Venema: Wietse: sender_dependent_relayhost_maps requires HOST syntax. sender_dependent_default_transport_maps requires TRANSPORT:HOST syntax. Marko Horn: thanks for showing me the mistake in my configuration

Re: repeated connect and disconnect

2020-10-08 Thread Jaroslaw Rafa
Dnia 7.10.2020 o godz. 20:02:02 li...@lazygranch.com pisze: > Is there something I should be doing to mitigate this problem? Firewall out IPs that show such behaviour? It's what I usually do... -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they'

Re: repeated connect and disconnect

2020-10-08 Thread Zsombor B
Just set up fail2ban, it will take care of this. Idézet (li...@lazygranch.com): Is there something I should be doing to mitigate this problem? Oct 8 02:11:42 myserver postfix/smtpd[11630]: connect from unknown[180.123.163.212] Oct 8 02:11:43 myserver postfix/smtpd[11632]: connect from

Re: repeated connect and disconnect

2020-10-08 Thread Marko Horn
hello, --- Mitten drin statt nur Datei! Am 2020-10-08 11:54, schrieb Zsombor B: Just set up fail2ban, it will take care of this. Idézet (li...@lazygranch.com): Is there something I should be doing to mitigate this problem? Oct 8 02:11:42 myserver postfix/smtpd[11630]: connect from unkn

Re: repeated connect and disconnect

2020-10-08 Thread Benny Pedersen
li...@lazygranch.com skrev den 2020-10-08 05:02: Is there something I should be doing to mitigate this problem? remote can solve it by disable ehlo or starttls - Linux 3.10.0-1127.19.1.el7.x86_64 #1 SMP Tue Aug 25 17:23:54 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux how old is this ker

Re: Accessing the sending user from a canonical(5) table

2020-10-08 Thread Wietse Venema
Demi M. Obenour: Checking application/pgp-signature: FAILURE -- Start of PGP signed section. > On 10/6/20 4:23 PM, Wietse Venema wrote: > > Demi M. Obenour: > >> On 10/6/20 12:46 PM, Wietse Venema wrote: > >>> For me, 'not found' also includes the case that the user is not found > >>> in the passw

Re: repeated connect and disconnect

2020-10-08 Thread @lbutlr
On 07 Oct 2020, at 21:02, li...@lazygranch.com wrote: > Is there something I should be doing to mitigate this problem? Fail2ban or sshguard can both see abuse like this and firewall the IP, I believe. I would add zen to the RBL lit, but really, nothing is happening here other than annoying log l

Re: Accessing the sending user from a canonical(5) table

2020-10-08 Thread Demi M. Obenour
On 10/8/20 8:25 AM, Wietse Venema wrote: Demi M. Obenour: On 10/6/20 4:23 PM, Wietse Venema wrote: If the feature is turned on then there should probably be a default action for users not listed in the table (deny or allow). Its not going to be pretty when only the numerical UID is avaialble (a

Re: Accessing the sending user from a canonical(5) table

2020-10-08 Thread Wietse Venema
Demi M. Obenour: > On 10/8/20 8:25 AM, Wietse Venema wrote: > > Demi M. Obenour: > >> On 10/6/20 4:23 PM, Wietse Venema wrote: > >>> If the feature is turned on then there should probably be a > >>> default action for users not listed in the table (deny or allow). > >>> Its not going to be pretty w

Re: sender dependent relay host problem

2020-10-08 Thread Wietse Venema
Marko Horn: > sender_dependent_relayhost_maps = > hash:/etc/postfix/lookups/relayhost/sender_relay > > sender_relay: > - > @testdomain.de fsmtp: sender_dependent_relayhost_maps requires a HOST, not a TRANSPORT. But it does not matter, because the postconf(5) manpage says: Th