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Questions tagged [smarthost]

79 questions
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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 port 465 instead of 587). Both of these fail with…
Jamie Kitson
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Switch smarthosts in Exchange when using dual WAN

I'd like to know if it's possible to setup Exchange 2003/2007 to switch between smarthosts, based on the WAN connection currently in use. Example scenario: I have two WAN connections with different ISP's. Exchange is running behind a dual WAN…
gazorp
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TLS Problems when changing providers relay host

Good Evening, first time posting. This forum and it has helped me many many times. I was looking to for some advice / views on a problem I’m having. The server is relatively old, Debian 6 to be exact but upgrading right isn’t an immediate option…
John
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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 "otm-". However the problem is that NDRs aren't…
user83664
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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 which is used by our internal Exchange 2013 to…
C. Göbeler
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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 find things out being blind but I want to come up to…
bindo
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Is there any way to relay e-mail without authenticating?

Deployed simple Postfix setup. Currently using Google's SMTP server as smarthost: relayhost =…
Bulat M.
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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 the relayhostparameter. But how do I set a…
panickedprocrastinator
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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 accepts connections on port 25. I've reconfigured…
ecellingsworth
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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 intentionally), like gmai@.cm which are written by…
Arunas Bartisius
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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 simple just with gmail.com), to let postfix use a…
sgohl
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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 emails being sent out by the server, (which is using…
Kzqai
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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 from GApps for local delivery to dovecot, but…
smallet
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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 PHP mail. Then PHP mail in turn uses sendmail. I…
sootsnoot
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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.d/acl/30_exim4-config_check_rcpt Add right after…
Yoann P
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