How to verify that the Return-Path matches the From header

Hi, Some of my users got emails pretending to be from the admin, but looking into the source of these emails, the From header was modified to mislead the users, but the return-path still holds the real sender email address. What is the best way to deal with this? Is it a good idea to match the Fro

Re: Need clarification about Content-Type on email

ation* Any idea? Regards. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Garanti sans virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&ut

Need clarification about Content-Type on email

Hi, I need some clarification about Content-Type on an email. Who does fix the Content-Type of an email? The mail client? or the sending server or both? We have postfix as our MTA and we use Horde Groupware for the web mail and both outllook and thuderbird as mail client. And know we are in pha

Re: bloc domains with all variants of tld

ampaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> 2017-11-06 11:07 GMT+01:00 Ralph Seichter : > On 06.11.2017 10:26, wodel youchi wrote: > > > We need to bloc some incoming emails from certain domains. > > How to write rules to bloc a domai

bloc domains with all variants of tld

Hi, We need to bloc some incoming emails from certain domains. How to write rules to bloc a domain with all its variant of tld? if we want to bloc the example domain we write the rules like this example.com REJECT example.fr REJECT example.de REJECT etc... How to write one rule to ex