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Questions tagged [relay]

23 questions
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1 answer

Postfix sasl_password file and MX resolution

Thanks to @AlexD idea, we'll implement the following transport table in order to simulate a IP failover using the DNS MX resolution (postfix 3.3) Relay for 2 domains, exemple[12].com exemple1.com relay:mx.myhost.com:587 exemple2.com …
Déjà vu
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Configuring postfix to use SendGrid SMTP relay with fixed FROM address but need to append REPLY-TO of original sender

I have been trying to resolve for a couple of months using multiple different configurations. The local delivery to a Dovecot mailbox (originalto@domain.org) keeps the original sender (sender@gmail.com) in the FROM address. The remote delivery using…
kcfez
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Postfix - some mails not sent to particular domain and syslog tagging issue

I have a problem with e-mails sent to a particular domain (alice.it). Usually the mail is corrected sent and in my postfix log I have this: 06104180AF: to=<**********@alice.it>, relay=mx.tim.it[34.141.161.132]:25, delay=200, delays=0/200/0.14/0.12,…
Stefano
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Is it legal for a DHCP relay agent to relay RENEWAL requests that were directly unicast to the "Server identifier" server?

I'm observing the following in a packet capture. Client -> Broadcast : DHCP Request Relay -> Client : DHCP Ack (Option 54 == Server) ... After T1 expires ... Client -> Server Identifier : DHCP Request Relay -> Client : DHCP…
user80551
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WireGuard policy-based routing

This question is about configuring a WireGuard relay that routes all its peer's traffic to another WireGuard server, but the relay itself does not use that WireGuard server as the default gateway. I am doing some self-hosting stuff. Currently my…
Waiho
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Windows DHCP Server does not give correct IP

I have a Windows DHCP Server with many scopes, each one related with a VLAN, and I have a PC connected to a switchport. Then, I am changing the access VLAN on this switchport to see if the PC receives the IP address belonging to such VLAN, but the…
fjulianom
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Postfix transport map with failover entries?

Postfix relays a few domains to a fixed IP address, or its failover address. 1.2.3.4 and 11.12.13.14 (failover) These two IP addresses are where the relay should occur. Currently, transport_map exemple1.com relay:[1.2.3.4]:587 exemple2.com …
Déjà vu
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POSTFIX : Relaying all domain users from postfix server to exchange

I deleted my post and re-created it to be as clear as possible. I m a beginner with postfix. So, I have a postfix server relaying mail to my exchange 2016 server. I want all domain users to be allowed to send email from postfix server to…
Alex Lum
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How to prevent postfix from sending e-mails without authentication

my first post here. I had a postfix that I'm using as a relay. I configured to use authentication with the following main.cf: https://pastebin.com/TQfmAQp2 The problem is: when I try to send an e-mail using "Send-MailMessage" in PowerShell within a…
joaoluizmf
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Why is my client server unable to send emails over port 587 while a telnet connection to my mail server is possible?

Host cannot send mail over relay host with port 587. I have two servers. One mail server and one server that uses the mail server as a relay host. The client server should send over Port 587. A telnet connection is possible between the client and…
Tom Krebs
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Postfix - Relay - authentificatin in Mysql

I tryed to manage with a postfix server, my goal is that : When 1 special user (test@example.com) try to send mail, it will use routing (using a relay server is OK) but I don't understand how to send authentification to the relay server to be…
PopFR1
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Using an existing Postfix + Dovecot server, how do I relay mail not intended for my configured domain?

I have a Postfix + Dovecot server that is receiving public mail and allowing folks to view their mailboxes using IMAP just fine for a particular domain (let's call the domain mail.acme.com). But, I have a second use for this server where I need to…
breusshe
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postfix configuration to prevent bounces when relaying to 3rd party (e.g. src -> my@work -> my@gmail)

i have an active mail relay that is using aliases as a main tool, at some point we started to get bounces for some emails. Source: somerandomsenderdomain.com Destination: myemaildomain.com mailinglist1: myuser@gmail.com,…
DrunkMice
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Relay emails to another server

I'm hosting all my users websites on server1, it has multiple websites, e.g. user1.com, user2.com, user3.com ... Our upstream provider no longer support reverse DNS, so I need to use server2 to help send out emails. Both server1 and server2 have…
Mien
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Postfix relay denied

I have installed Cyberpanel with postfix installed I am facing Relay Denied error while sending out the emails i.e.gmail.com or any other external I have tried googling and read many posts but not able to get is work The main.cf is as…
Rizwan
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