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The terms modern security standards standards was "little" vague here. No one except google can explain what is the exact meaning of modern security standards standards. However, after lurking the internet about this term, here some explanation about this incident. apsillers answer on Security.SE In my understanding, "less secure apps" refers to ...


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Permission Group: ms-Exch-SMTP-Accept-Any-Recipient Via PowerShell: (includes anti-spam bypass) Get-ReceiveConnector <RelayName> | Add-ADPermission –User “NAME” –ExtendedRights ms-Exch-SMTP- Accept-Any-Recipient,ms-exch-bypass-anti-spam


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Exchange only rejects emails that are too large on the SMTP level if you set the size limit in the individual receive connectors instead of on the global level. Open the Exchange Control Panel, go to the "Mail Flow" option located on the left pane and in the right pane, click on "Receive Connectors". Select the "Default Frontend" receive connector and ...


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Sender verification creates an additional load on the foreign MTA's so it isn't recommended. But you can setup a general spam-proof MTA. My experience shows that two simple conditions helps to detect about 90% of spam: Senders without PTR-record are definitely spammers. Those who can't setup PTR for a legal MTA are even worse. Senders with dynamically ...


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This isn't going to be an answer, so much as an explanation of the complexity of what you are trying to do. You have to ALWAYS remember that an email can be addressed to more than one recipient. You said "I want to not queue it if it's a forwarder". Well, what do you do when one is forwarder and one is a local mailbox? You only know the content of the ...


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In my case, the other answers didn't helped me, because I already had the context for those files correctly. Even if the file's correct context are applied, you'll also need to be sure the Apache user has SELinux permission to send mails. Specifically there is a SELinux configuration that need to be turned on. Verify if the setting is on or off: getsebool ...


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Two things to consider ensure mydestination parameter doesn't contain mydomain.com, mydomain or myhostname Set relay_domains = mydomain.com in main.cf


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The answer to your question is straightforward. If the zimbra (which is postfix) server is configured as the final destination for domain.com, while the mail is in the active queue, it will then see that it can be delivered via the local transport, and be sent directly to the mailbox, without passing through the relay server.


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Not sure why you say: "I understand that I'll need postfix on each of these servers". Unless your various applications require it (which would be strange) to send out anything, you could have one server with Postfix and all of your other server just get configured that their SMTP server is your server running Postfix. However, there is one reason why you ...


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I'd recommend configuring all servers as satellite servers which send their mail to the central postfix. This has some advantages: Easier to maintain as you only need to configure one mail gateway with SPF, spam prevention, mail routings etc. All other nodes just send their mail to the gateway node. Incoming mail only needs to be handled by one server (as ...


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Instead putting me@example.com in transport_maps, you can skip that step and use virtual_alias_maps directly. # transport maps example.com :[mail.provider.com] .example.com :[mail.provider.com] # virtual alias maps me@example.com me@me.com Virtual alias maps is special mapping in postfix that overrides email aliasing regardless their domain ...



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