Scrollout as primary and backup servers
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Hello everyone,
I'm planning to upgrade my backup MX (actually a nice and simple postfix with a queue of 30 days that relay mail to primary when it come back alive).
I had experienced weird behaviour and few mail lost (well not so weird)
Ok here the thing :
Primary offline, so mail ar incoming to backup. When primary is back, the queue is flushed.
But as it s my backup that send mails, some that does have SPF/DMARC/DKIM security features are rejected by my primary.
Let s say i have a gmail mail in queue. When it arrive to scrollout, it is rejected because the server that send it is my backup and not a google server. It s a good thing but in my case not that good.
Well i ve read here and there about SRS wich should be my solution, but once activated on the backup, scrollout reject again those mail because of bad SRS format (can't recall the exact error message, will do it again and post back). I've tried many different configs, nothing appear to work as exepted. So, for now, what i do is when my primary come back online, i bypass the scrollout by sending directly to final exchange from backup, wich is really not a good solution to me ..
What i'd like is primary > scrollout, backup > something (another scroll out would be fine to me).
When primary is offline, backup retains mails and when primary back online, queue flushed to primary.
The primary will then formward mails to my internal mail server.
I'm not sure that scollout can "retains" mails when the "next hop" in route is offline ...
If any experts around here can help me.
Thanks !
PS excuse my "not so good english" ... French here ;)
why have primary and backup? just have both deliver to the internal server and set one of the scrollout boxes with a lower mx priority?
Hello,
The internal is self hosted behind my VDSL (and behind my firewall). As I don't want to expose my exchange directly, I ve put in front a Scrollout.
It's also a "non pro" internet access, it can have some trouble (and it does sometimes) or i can have some power issues (it happens quite a lot where i live), so i did rent a OVH VPC solution as "backup".
About pririty MX, this is what i've done, one at 20 and the other at 30
Will try again SRS this week and post back results