We have an internal Exchange Server which receives an sends mails through pmg. LDAP is not set up, so its only a gateway.
All is working as expected so far.
We have an DMARC and an SPF entry setup which tells to reject non conform mail senders.
Here comes the problem, were I want to find a workaround;
If a Mailbox puts in an out of office message, the mail gets bounced by some receivers (eg. google) because of:
I understand that Exchange puts in an empty sender into the "out of office" message. On Outlook there is a sender so I guess there is a second header (return-path, envelope?) which includes the correct mail sender adress.
Whould it be possible to add the missing sender header with a proxmox rule without "cringing" around with exchange?
Does anyone found already a working solution for this?
Thanks for our Advices.
All is working as expected so far.
We have an DMARC and an SPF entry setup which tells to reject non conform mail senders.
Here comes the problem, were I want to find a workaround;
If a Mailbox puts in an out of office message, the mail gets bounced by some receivers (eg. google) because of:
I understand that Exchange puts in an empty sender into the "out of office" message. On Outlook there is a sender so I guess there is a second header (return-path, envelope?) which includes the correct mail sender adress.
Whould it be possible to add the missing sender header with a proxmox rule without "cringing" around with exchange?
Does anyone found already a working solution for this?
Thanks for our Advices.