Re: Postfix - Check SPF for outgoing email

2021-02-01 Thread Scott Kitterman
On Monday, February 1, 2021 4:32:21 AM EST Jonathan Sélea wrote: > Hi everyone, > > We currently have a webhosting-environment with many websites. Those > websites is capable of sending email (obviously) via the local SMTP > function. > But sometimes, some of the websites is compromised and used t

Re: Postfix - Check SPF for outgoing email

2021-02-01 Thread Matus UHLAR - fantomas
On 01.02.21 10:32, Jonathan Sélea wrote: We currently have a webhosting-environment with many websites. Those websites is capable of sending email (obviously) via the local SMTP function. But sometimes, some of the websites is compromised and used to send quite alot of spam from the websites -

Re: Postfix - Check SPF for outgoing email

2021-02-01 Thread Ahsan Khan
Hi Jonathan Can you not restrict the SMTP relay to allow only those allowed servers and reject emails from all other sites? or may be allow only specific domains to relay through. Regards Ahsan On Mon, Feb 1, 2021 at 3:02 PM Jonathan Sélea wrote: > Hi everyone, > > We currently have a webhos