Re: virus scanning

has hooks for this. If the smackafee product doesn't offer a service for this instead of messing with another process' files, it is not worth whatever it costs. Op 8 mrt. 2022 15:57 schreef Zsombor B : Hi, Can you please confirm that postfix creates a file from each and every email at least once?

virus scanning

Hi, Can you please confirm that postfix creates a file from each and every email at least once? I'm asking this because we have to switch to McAfee AV and my plan is to use it's on-access-scan feature to scan the emails. If postfix really creates a file at least once of each email then

multi instance and always_bcc

Hi, We'd like to debug some emails sent through a multi instance withouth having any impact on the mail flow so I have added always_bcc=de...@whatever.com to the main.cf of that instance and reloaded it. But instead of sending copies of the emails to the debug address, postfix relays

Re: automatic config reload

Hi Wietse, Thanks for the explanation, now it's clear. Zsombor On 2021.08.25 03:54, Wietse Venema wrote: > Zsombor B: > > Hi All, > > > > > > We had a mail service outage caused by a storage issue (the volume > > with the custom config files we

automatic config reload

Hi All, We had a mail service outage caused by a storage issue (the volume with the custom config files went down) and postfix kept looking for config files which were unavailable. We also see in the logs that postfix keeps checking for modified config files and if it finds an updated config

time spent in queue

Hi, An email has spent ~6 hours in the queue: 2021-06-09T12:15:46+00:00 from=, size=1761, nrcpt=1 (queue active) 2021-06-09T18:25:43+00:00 postfix/smtp[26900]: 4G0R023WFLzNnVL: to=, relay=[]:587, delay=22197, delays=0/22197/0.07/0.01, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued

empty sender in bounce message

Hi, I'm sending an email with a valid address to an invalid one (i.e. the destination domain doesn't exist). The bounce message is rejected by the valid sender's mail server because the sender address is empty. The question is why the sender is empty and how can be this solved? Example:

replying with OK

Hi, Is there a way to reply with 'OK' to the sender instead of 'relay access denied'? Reason: thousands of junk emails per day are sent from DEV environment to forged recipients but there is only a couple of recipient domains are allowed. The others get 'relay access denied' but the

email loops back from localhost

Hi, Can you help me please why does this fall into a loop? postfix > localhost:1 > localhost:1 > localhost:1 > etc. until too much hops. --- main.cf: transport_maps = hash:/etc/postfix/transport --- /etc/postfix/transport: recipi...@domain.com smtp:[127.0.0.1]:1 ---

Re: providing queue id for the clients

Hi, Please provide evidence. This is the point. :) External client sent us a mail we accepted with queue id "A". I have asked them to look for this "A" in their logs. I was told they can't find it in their logs. Zsombor Idézet (Wietse Venema ): Zsombor B:

providing queue id for the clients

Hi, It turned out during an investigation that our postfix servers don't provide a queue id for the external clients when accepting a new email. However the very same servers do provide queue id for internal mail servers. Is there a specific configuration option to provide the queue id

stop retransmitting failed delivery

Hi, Microsoft has this policy at https://postmaster.live.com/pm/policies.aspx "After given a numeric SMTP error response code between 500 and 599 (also known as a permanent non-delivery response), the sender must not attempt to retransmit that message to that recipient." How can this be

Re: limiting connections to a single host

0-486-9075 -Original Message- From: owner-postfix-us...@postfix.org On Behalf Of Zsombor B Sent: Thursday, November 5, 2020 8:12 AM To: postfix-users@postfix.org Subject: limiting connections to a single host *Message sent from a system outside of UConn.* Hi, I have to relay mails

limiting connections to a single host

Hi, I have to relay mails to a mail gateway that often rejects connections because we are too pushy. The admin of that service suggested us to open X connections and send Y messages per connection. How can I set this up either for one specific destination or to all? Thanks in advance,

Re: multiple relay servers

, dumb rules. Thanks, Zsombor Idézet (Wietse Venema ): Zsombor B: Hi All, Customer asked us to relay their mails to a specific smtp server. Actually they provided 6 possible destination servers. When add them to sender_dependent_relayhost_maps postmap complains that there are duplicate

Re: multiple relay servers

I can' force the customer changing their DNS. Any postfix solution? BTW it looks like postfix delivers mails to all the relay servers so the postmap warning is a bit misleading as if it won't work. But this brings up another question: if any of the relay servers can't accept mail will

multiple relay servers

Hi All, Customer asked us to relay their mails to a specific smtp server. Actually they provided 6 possible destination servers. When add them to sender_dependent_relayhost_maps postmap complains that there are duplicate entries: @foo.bar [mail1.whatever]:123 @foo.bar

possible bottlenecks

Hi, I know this is a complicated question but what/where do you see possible bottlenecks in postfix? Is it CPU? RAM? Disk IO? I'm building an infra to send out ~3-5 million emails a day. There are no known peak periods of the day but that's also sure that the load will be uneven (no

Re: repeated connect and disconnect

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: strangely incoming mails

Hi, Thanks everyone for the replies. Sorry I can only answer this way now. This is postconf -n: https://pastebin.com/SmZG9SxG This is master.cf: https://pastebin.com/S6h83rxi 1) Bastian Blank: I started to check the steps on http://www.postfix.org/DEBUG_README.html but it will take some

strangely incoming mails

Hello, I'm confused and need your help. I run a small server with rspamd as spam filter (smtpd_milters = inet:localhost:11332). There are only a limited number of users, they only can send emails with smtp auth. Until recently everything was fine but in the last couple of days huge

Re: more recipients on the same relay server with smtp auth

Wietse, Viktor, Thanks for your kind answer. It seems a bit difficult but I'll try to understand and apply it. This request (redirect emails of certain domains to 3rd party mail providers with auth) can't be denied because we are moving from commercial mail security appliance to postfix

more recipients on the same relay server with smtp auth

Hi All, I need your thoughts. Some of our customers wanted us to forward all emails sent to some recipient domains to 3rd party relay servers instead of the mail server defined in the recipient domain's MX records. Also they provided smtp username and password for these relay servers.