Re: Search for free MX Backup Service

2021-07-01 Thread Richard Salts
On 2/07/2021 3:54 pm, Maurizio Caloro wrote: Hello Searching any Service that offer free any possible MX Backup? Why do you need a backup MX? Usually MSAs will queue for a while (4 days seems a common default due to language in the smtp RFCs) or the senders will get a bounce notice. If you

Search for free MX Backup Service

2021-07-01 Thread Maurizio Caloro
Hello Searching any Service that offer free any possible MX Backup? Found kisolabs "dot" com but it seems this service are down Thanks for possible update or help Regards Mauri

Re: Postconf and postmap in check_policy_service scripts

2021-07-01 Thread Kevin N.
Matus UHLAR - fantomas: I was curious if I could do a script that would do the same, with the same possible issues. I can do perl, but it looks neither python nor perl have interface to postfix what could e.g. expand maps without calling external commands. Among other things, it mainly acted a

Re: Postconf and postmap in check_policy_service scripts

2021-07-01 Thread Wietse Venema
Matus UHLAR - fantomas: > I was curious if I could do a script that would do the same, with the same > possible issues. > > I can do perl, but it looks neither python nor perl have interface to postfix > what could e.g. expand maps without calling external commands. One solution is when the table

Re: Postconf and postmap in check_policy_service scripts

2021-07-01 Thread Matus UHLAR - fantomas
This will limit scalability, but can work with low request rates. However, there is an inherent danger to using arbitrary email addresses from the internet in a shell command line. Depending on how the commands are run, there may be shell command injection opportunities when an email address co

Re: Postconf and postmap in check_policy_service scripts

2021-07-01 Thread Kevin N.
Hi Viktor, Thank you for the suggestion. Are there any other general areas that I should be looking out for in this kind of situations? Cheers, K. It appears that some care has been taken to do it right. In principle something like this should be sufficient. You'll need to review the code

Re: reject_unverified_recipient for local domains only

2021-07-01 Thread Wietse Venema
Dima Veselov: > Greetings, > > I use dovecot LMTP as a virtual transport and of course I do not > want to relay and bounce e-mails for non-existent users. As I found > reject_unverified_recipient is the only way to check recipient > before relaying mail, because reject_unlisted_recipient will not

Re: reject_unverified_recipient for local domains only

2021-07-01 Thread Matus UHLAR - fantomas
On 01.07.21 12:04, Dima Veselov wrote: I use dovecot LMTP as a virtual transport and of course I do not want to relay and bounce e-mails for non-existent users. As I found reject_unverified_recipient is the only way to check recipient before relaying mail, because reject_unlisted_recipient will n

Re: Postconf and postmap in check_policy_service scripts

2021-07-01 Thread Viktor Dukhovni
On Thu, Jul 01, 2021 at 02:18:06PM +0300, Kevin N. wrote: > From what I can see postconf and postmap are called using Python's > subprocess.Popen, like so: > > subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, >encoding='utf-8', shell=False) > > whe

Re: Postconf and postmap in check_policy_service scripts

2021-07-01 Thread Kevin N.
Hi Wietse, Thank you for the detailed explanation. This will limit scalability, but can work with low request rates. However, there is an inherent danger to using arbitrary email addresses from the internet in a shell command line. Depending on how the commands are run, there may be shell c

reject_unverified_recipient for local domains only

2021-07-01 Thread Dima Veselov
Greetings, I use dovecot LMTP as a virtual transport and of course I do not want to relay and bounce e-mails for non-existent users. As I found reject_unverified_recipient is the only way to check recipient before relaying mail, because reject_unlisted_recipient will not work with LMTP. The othe