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Questions tagged [smtp-headers]

Email headers such as Received-By: are SMTP headers.

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Scrub header for internal servers in Postfix?

We have all internal Centos servers sending mail to 2 outgoing MX servers in our business. I want to scrub the headers on our 2 outgoing MX servers to remove the information from where they originated. I don't know the syntax of this very well and…
travmi
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Bounce message from gsmtp - weird message path

Please consider the following email headers from a message that was returned to the original sender. The multipart bounce message also contains the transcript (clear text + HTML) of the correspondence between the original sender and the intended…
asdfghjkl
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Postfix FROM header defaults

I have tried and tried to google my way out of this. This definitely has to be a very common problem because I am half-way intermediate at Linux and etI am complaining about default settings and how to change them. On the webserver I have a basic…
dockeryZ
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Hide server ip from email header

I use ddos mitigation services on my server and due to this it is very important that my server ip stays hidden. I own two servers, the primary server houses my website and the secondary server is used for emails. I use the secondary servers smtp…
droidlabour
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Postfix Header Filter

I have set up a header filter in postfix to discard messages from Russia and Romania because of the volume of spam coming from those and we do not currently do business in those countries. My regex looks like this /^From:.*\@.*\.ro/ …
Jesse Cain
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How do I change the received url in outgoing emails

I've got a cheap and cheerful dedicated server from 1and1 that I use to send emails. The received email header looks like this: Received: from s123456.onlinehome-server.info (s123456.onlinehome-server.info. [82.165.11.111]) I'd like that to…
Grim...
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Postfix add custom header with random value

I am trying to add a custom header to all messages handled by my postfix server. I tried using a guide on the internet without any luck. In my master.cf i added: -o smtp_header_checks=regexp:/etc/postfix/test_tag_header test_tag_header: Prepend…
Frank
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Does an SMTP request contain host header information (or just the IP of the targeted SMTP server)?

We are using an external commercial smtp server for our newsletters (sending them through .NET components), and they offer two smtp URLs - smtp.critsend.com and fast.critsend.com -, and the second one is reserved for sending singular emails, the…
Olaf
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Adding To: header to incoming mails using hMail server

I have just enabled plus-addressing with my instance of hMailServer. Now, whenever I sign up for an online service, I can easily provide a unique email address for that service. This is part spam-prevention and part curiosity. If the unique email…
Mikuso
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Content-Type header stripped in Email after switching servers

My program sends daily emails to users. I recently switched servers and once we setup the email job on the new server, one of our users complained that they are receiving the email in plan text. No other user has this problem. The header that most…
TopDogg25
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Exchange 2003 - SMTP from address not matching Active Directory

Is there a way to configure Exchange so that clients that do NOT use native exchange connector (Osx mail, or outlook configured as POP) get the sender name information from the Active directory? Example: I create a user and in AD I set his display…
Asis
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Postfix rewrite header issue

I currently relay all my cPanel (exim) outbound emails through my Postfix server. However, postfix seems to remove some important part in the header that exim added before sending to relay. As example, exim add in the headers the path of the PHP…
Karl
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Lotus Notes 8.5 - How do I alter the FROM value in the headers of my outbound emails?

I'm running a Lotus Notes 8.5 client (through a domino server). I have a really ugly FROM value in the header of my outbound emails: firstname.lastname@company.com I want a nice neat "Firstname Lastname" How do I…
Callum
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Postfix smtp_header_checks does not prepend header, but ignores or warns

I am trying to add those headers to email sent via the postfix server: Precedence: bulk Auto-Submitted: auto-generated These are the configuration files and only header_checks adds the correct header. /etc/postfix/main.cf #add header header_checks…
Daniel L
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Postfix header_checks are ignored

I'm using Ubuntu 20.04. I installed Postfix (v3.4.13) with Dovecot (v2.3.7.2) a long time ago. Now, I want to overwrite the Message-Id header using header_checks. It's the first time I'm trying to use this feature, so it hasn't been tested before.…
Ugnius
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