Questions tagged [smarthost]

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Exim:Use specific smarthost for certain recipient domain only

I'm looking for solution for the case described below. I've to send mail to some domains (hotmail, outlook) via smarthost, because of blocking my server's IP (Hetzner) on side of Microsoft. Key ...
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0answers
7 views

using sendmail server when smarthost is added, unable to send mails to my mailbox. Have anyone have milter-bcc configured successfully?

using sendmail server when smarthost is added, unable to send mails to my mailbox. Have anyone have milter-bcc configured successfully ? or do we have any alternative process that worked for anyone ?
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How to redirect only matching mailboxes to a smart host

I have o365/Exchange configured as an internal relay, so it sends incoming mail for which there is no mailbox onwards to a smart host. The smart host only handles email for addresses prefixed with "...
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38 views

Why are out of office mails accepted by receiver when they bypass postfix smart host?

With internal recipients everything works great. Exchange 2010 Out of office mails are sent and received. For external recipients, out of office mails are sent OK but they are not accepted by the ...
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1answer
411 views

Forged FROM: header despite reject_authenticated_sender_login_mismatch

structural description Server A runs postfix and acts as smarthost for server B (also running postfix), reject_authenticated_sender_login_mismatch is set and works (almost) as expected, see below ...
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0answers
78 views

Forwarder doesn't work with smarthost

I set smarthost on exim configuration on the server However, forwarders stopped working for a reason. I got this message when I check it on email reports The system failed to locate the message ...
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0answers
48 views

Does Exchange 2013 cache smarthosts?

I am getting desperate and start to question my own sanity so maybe one of your can give an explanation for some seemingly strange Exchange 2013 behaviour. I'm trying to change the url of a smarthost ...
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2answers
2k views

Exim Smarthost Multiple domains and credentials Mailgun

I have a GCP instance running with whm/cpanel and mailgun setup using exim for multiple accounts using multiple domains. The current setup works for all domains however it only validates for the ...
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1answer
102 views

How to get LAN server to send out via smarthost?

I've got a server on my LAN runnnig exim4 configured to use a smarthost on the WAN like this: disable_ipv6='true' dc_eximconfig_configtype='smarthost' dc_other_hostnames='hostname.mydomain.com' ...
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1answer
722 views

IIS 6.0 SMTP Virtual Server do not AUTH on Smart Host

We're using IIS 6.0 SMTP Virtual Server to receive and forward e-mails from our website hosted on the same dedicated machine. Everything worked fine, up until we recently transfered the e-mail service ...
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1answer
385 views

Exchange Server 2016 Standard: Connect mailbox to external mailbox [closed]

I'm searching for a method to connect exchange mailboxes with external mailboxes. I checked the EAC (found Send and Receive Connectors but they don't seem to be the right answer) and on web (found 3rd ...
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1answer
1k views

Postfix as a smart host? Is this possible

We have 3 SMTP servers on 3 separate public static ip's. We have a secondary failover connection on a single static ip. I would like to put all 3 SMTP servers behind the router and off the public ip's,...
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1answer
214 views

postfix smarthost outboud mail server

Greetings good people, I'm really exhausted trying to understand a certain postfix setup by going through its config files. I know this question sounds a little strange to you all as im trying to ...
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2answers
134 views

Exim4: Local delivery after spamcheck of an outgoing email

domain.com and domain.net are hosted on one and the same server server1. To avoid SPAM and viruses all outgoing emails (even to local domains) are subjects to scan with a 3rd party service. Thus ...
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1answer
618 views

Is there any way to relay e-mail without authenticating?

Deployed simple Postfix setup. Currently using Google's SMTP server as smarthost: relayhost = [smtp.gmail.com]:587 smtp_sasl_auth_enable=yes smtp_sasl_security_options=noanonymous smtp_use_tls=yes ...
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1answer
347 views

Exchange route mail to internal smart host

We have a BI/ETL tool which is capable of triggering tasks on receipt of an email. We have a number of servers set up running this tool. Each is configured as an IIS 'smart host'. We currently use a ...
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1answer
17k views

Fixing starttls verify=fail, verifymsg=unable to get local issuer certificate

Running Amazon Linux on EC2 instance with sendmail. I have an email account with Network Solutions, and use that account as a SMART_HOST relay in my sendmail configuration. It works well except for ...
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1answer
93 views

Configuring postfix to use smarthost

I have an application running on centOS 7, which needs to be configured to send mail(postfix) to a third party SMTP server. I have found that a way to accomplish this is to configure a smarthost using ...
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1answer
79 views

Turning off EOP connector during maintenance

I have a virtual mail server in house protected by Exchange Online Protection, and it has been running well for the last few months. Over the weekend, the hosts that host the VM will be taken down, as ...
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2answers
2k views

Exim client not issuing STARTTLS when connecting to smarthost

I have a Debian8 server running exim4 that sends outgoing mail by smarthost through NameCheap's mail.privateemail.com smtp server - or at least it use to. After a recent update, the server no longer ...
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0answers
339 views

Force sendmail to check recipient domain exists

There is sendmail relay host for LAN/external users using AUTH or trusting local users, but there is a problem that sendmail accepts mail from trusted users addressed for non existing domains (non ...
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1answer
2k views

How to choose a smarthost based on From: address in exim4 on Debian

I want to route emails with the From: .*@host1.com through smtp.server1.com and emails with the From: .*@host2.com through smtp.server2.com. For the moment, I have smarthost configured with dpkg-...
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1answer
456 views

exim: different password for remote smtp relay smarthost

Currently I have my exim configuration set to send all e-mails using an external SMTP server. All users authenticate with my exim server with a local password and then the messages sent is relayed ...
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0answers
41 views

Smarthost percentage of mail on Exim4

I'm transitioning mailing of a sizeable number of mails (maybe 1m/day) to another host. I want to warm up the new host gradually over a month rather than suddenly start sending through it and appear ...
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1answer
1k views

Conditional use of relay(smarthost) for recipient domains matched by header_checks in postfix

On a postfix mailserver, which is configured to generally send mail directly (internet-site), I want to implement a conditional header check for some receipient domains (in this example to keep it ...
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1answer
1k views

Exim4 working fine at sending emails, except to addresses with the fully-qualified domain in them

Exim is always touch-and-go for me to configure, since I only touch it once every 4 or 5 years when I have to make email work on a new server. As a result, I'm now having a problem where all the ...
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1answer
401 views

How to check if Exim has copies of outgoing mail

We're using a pretty simple Exim configuration which basically forwards all incoming mail via a Smarthost to a handful of final recipients. Normally this works fine - we don't read any mail on the ...
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1answer
579 views

Postfix - relay locally generated mail but accept mail incoming from GApps for the same domain

I know the way to disable all local delivery is to remove the domain from "mydestination", which will cause all mail to be relayed through whatever relay I setup. But I want postfix to accept all mail ...
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1answer
1k views

Postfix smarthost, allow relay by dynamic IP

I have several servers (web, mysql, java) that have postfix installed which are set up to relay to a smarthost postfix server. DYNAMIC IP STATIC IP INTERNET [...
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1answer
2k views

Postfix: As a smarthost, how can I limit incoming mail to sender domain and sender IP?

I'm running a Postfix+Dovecot service on Centos 7 with a few unrelated virtual domains. This same Postfix server is also set as a smarthost (relay) for IP 192.0.2.2 and 203.0.113.2. Right now, ...
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1answer
230 views

smart host does not deliver email if date header sent?

I use MantisBT 1.2.6 on an Amazon Linux server. It has its own email-sending class layered on top of the PHP mail() function. Actually, it has other options to use smtp or sendmail directly, but I use ...
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1answer
2k views

Postfix SASL with Dovecot and Authenticated Smarthost

I have a bit of a problem; I have configured postfix to use dovecot for SMTP AUTH, therefore I had to specify dovecot authentication in the main.cf file. The problem is, I need to also authenticate to ...
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1answer
2k views

Exim4: Deny outgoing emails with specific destination domains to being sent to the smarthost

I try to deny outgoing emails with specific destination domains to being sent to the smarthost but unsuccessfully. I'm on a debian "squeeze" configured to use a smarthost. vi /etc/exim4/conf....
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1answer
465 views

On debian, how to set up a MTA like exim that allows per user smarthost configuration?

I have a problem setting up something that I think would be cool. I have a server (Debian Wheezy) and I would like to let my users send email from their smarthosts. From what I have read, exim allow ...
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1answer
149 views

Does sendmail send everything to downstream smarthost in “single file”?

CentOS 5.x / SendMail 8.14.x I have a SendMail server that delivers all outbound mail to a downstream smarthost in the cloud: define(`SMART_HOST',`relay:[example.blah.com]')dnl example.blah.com ...
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1answer
5k views

exim4 - Why is rate limiting outbound mail to a smarthost only working with acl_not_smtp?

In an effort to rate limit outgoing emails per recipient (all emails are sent by the same user), I've been doing some testing in a very simple environment: ...
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112 views

Sendmail smarthost making my big mails sent AND stuck

In order to send my mails from my local Sendmail server to external address, I make it connecting to an authentified SMART HOST provided by my ISP. The sendmail.cf has the following DS line : DS[...
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1answer
2k views

Plain-text login with sendmail and SASL, Ubuntu 10.04

I'm trying to configure sendmail with a smarthost. I mostly followed this guide (although I understand it is written for Scalix). SMTP server uses plain-text authentication. However, when sendmail ...
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1answer
9k views

Set up Exim to authenticate users and then relay SMTP mail via smarthost using different auth

I am attempting to use Exim to function as an SMTP server which relays mail as a smarthost to our Mandrill service. (The point of this would be using Exim to authenticate our users for IMAP mail and ...
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1answer
452 views

SMTP as SmartHost for SendMail

My general task is following: We have workable application that sends mails to the users (that are registered in this application on some actions); Mails are sending using sendmail tool; In order to ...
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2answers
10k views

Sendmail: Mails are still being relayed to root@localhost

I am running CENTOS 6.2 with 2 virtual machines one 'auth'(192.168.0.2) and another proxy (192.168.0.3). Proxy host has no internet connection. My intention is proxy host will send its mail to auth ...
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1answer
383 views

Postfix, MSA, Smarthost, and LAN

I've, let's say, 5 servers. They are either public and private or only private (network), they all send e-mails, either system e-mails (local mailbox) or installed application (wiki, issues tracker, ...
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1answer
1k views

SPF + ISP Smarthost, always untrusted?

One of the ways mail-servers protect themselves from spam is by SPF-records, a DNS look-up saying what ip-adresses are allowed to send mail from a given domain name. Another way the mail-servers use ...
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3answers
664 views

EXIM - Send local mail to Gateway First

My mail server is protected from spam by our Barracuda appliance. I'm trying to configure EXIM to forward ALL outbound messages to the Barracuda server first, including mail for local domains. Once ...
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1answer
2k views

exim4 smarthost with sender verification

I'm trying to set up exim4 as a smarthost in front of the ISP mail server. Everything works fine, except from some emails coming from invalid senders (most likely spam). The ISP rejects them with 450 ...
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1answer
2k views

Exim SMTP Smarthost Setup

I used these settings to set up exim to use gmail as a smarthost, which worked. However, I don't seem to be able to use these settings against other smtp servers, such as Yahoo or Fastmail (both with ...
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1answer
2k views

remote smtp with local failover

i want to make a specific setup for my site but im not sure if its possible or how to do it... The thing is, my site had a few issues which i tracked to connectivity problems to mandrill, so i ...
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1answer
2k views

Windows SMTP Service - Configure Smarthost for Specific Domains over different ports

I have a client that was recently acquired by a company. Their email system now resides on the parent company's network. Currently there is no VPN setup between my client and the parent company. I ...
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1answer
3k views

Exchange won't log in to smart host

My Exchange 2010 server is configured to relay mail to a smart host. Basic authentication is required over TLS. For some reason, Exchange doesn't feel like logging in. I see the following error ...
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1answer
562 views

Multiple Smarthosts in an Exchange 2007 Send Connector: what order, if any, are they used?

Just like the title says: if you have multiple smarthosts in an Exchange 2007 Send Connector, what order, if any, are the hosts tried? Random (roundrobin like behavior) or top to bottom?