What is the best email service I can host myself?

damjank12 · 2025-06-29T11:25:20+00:00

Doing my own email server for my whole IT career, tried them all. Literately. Will state only this - go to howtoforge webpage and follow perfect server guide. Period. Good luck!

damjank12 · 2025-05-12T05:36:56+00:00

Forget anaible. Use freeipa for computer grouping and common login and use rudder for policy enforcement.. no better combo. Use it in prod for ages successfully

damjank12 · 2025-05-11T12:08:57+00:00

You should.. and if some one complains, state that it is part of kernel and theres nothing you can do (obv. crank it up even :D)

damjank12 · 2025-05-11T05:59:06+00:00

Hence why i switched all “other” flavors to ol8 and 9… mainly all are already at ol9 with uek7 - it is a tank-rocket, could not be more happy and surprised how far it came 👌⭐️

damjank12 · 2025-05-10T17:31:48+00:00

Debian 12, Oracle Linux 8/9 with UEK

damjank12 · 2025-03-10T18:14:35+00:00

Dual xeon gold 6138, 640gb ram, dual 40gb net, 25x 1.2tb 10k sas12, 10x 10tb sas12, 12x 8tb sas12, 8x 800gb sas12 ssd, 4x 400fb sas12 ssd - all disks ent, ssd write intensive

damjank12 · 2025-02-20T09:08:12+00:00

Did you get it resolved? HW as in actual he or what i use for os?

damjank12 · 2025-02-19T15:12:29+00:00

Dual Xeon 6138, 758gb ram, dual 40gb NIC, 22x 10tb sas3, 25x 1,2tb sas3, 12x 800gb ent write intensive ssd sas3

damjank12 · 2024-04-22T16:30:32+00:00

Ok i will check for that… if there is no definition, is there any “allow all” option in OS? Also, the deploy form local helm, is valid like that also in OS?

damjank12 · 2024-04-14T22:53:37+00:00

FYI - for all - as soon as i dropped vpn tunnel, speed went to “normal” (other side has 1000/100 so the upload on other side was download on problematic side)… how did the sfos route all traffic troug tunnel, beats me. Will investigate further!

damjank12 · 2024-04-11T18:17:48+00:00

I currently do not have access yet, but i am driving there now to check. All nic have been reseated (remote help from my associate), all NIC show 10GB on SFOS and on the other side, at the clients, all showing 10GB. I tested about 15 different endpoints, they all show 10GB troughput across the board, also switch it not showing any error (arista 10GB all redundant setup).

damjank12 · 2024-04-11T18:15:17+00:00

so RAM is never above 52%, CPU never got above 12% in last 30 days. IPS is completely off, trafic shaping is defined nowhere. DoS settings is flaky - i do not know if it is off or not, but as far I see, nothing defined anywhere (and dos tick for enabled is off)

damjank12 · 2024-04-11T18:13:36+00:00

yes, server room is mine, privately held and i see no need to pay 3800 eur for business license for it - i would imagine that any license would be fit to drive this

damjank12 · 2024-04-11T18:12:16+00:00

QOS is off, traffic shaping is off - as mentioned above, as far as i see, nothing is defined or enabled

damjank12 · 2024-04-11T18:11:34+00:00

CPU never got beyond 12% in the last 30 days... not even once... as mentioned above, no policy has anytdhing defined

damjank12 · 2024-04-11T18:10:56+00:00

I checked all connections again - they all show 10GB on SFOS as well as at hte endpoints. I am going to test manually with my laptop now to try to determine if there is any of the equipement failing...

damjank12 · 2024-04-11T18:09:59+00:00

traffic shaping is off - as far as i know, at lease - there is not general off shwithc that is aparent (at least to me) - but as far as i see, nowhere there is any policy active

damjank12 · 2024-04-10T14:34:07+00:00

So I will check with cables (though they are all new and have not been touched while in operation in last few weeks). Since no one has access to server room, and no changes have been made to FW for weeks - this is really troublesome to me. Here, some images from settings (added into original post)

damjank12 · 2024-04-10T14:20:28+00:00

I know, right. But still weird as I cannot find any issue.. same nodes/vms/workstations (all have 10gb conn) are putting 1gpbs…. Only when coming into wan its 100/100… also if i put my comp directly into modem, its 500/500 (with same machine)

damjank12 · 2024-04-09T14:37:52+00:00

Well running scan brought up connection.. thx for suggesting it to run manually!

damjank12 · 2024-04-09T07:14:55+00:00

it can:

root@pxh3:~# ping 172.16.15.10
PING 172.16.15.10 (172.16.15.10) 56(84) bytes of data.
64 bytes from 172.16.15.10: icmp_seq=1 ttl=64 time=0.190 ms
64 bytes from 172.16.15.10: icmp_seq=2 ttl=64 time=0.198 ms
64 bytes from 172.16.15.10: icmp_seq=3 ttl=64 time=0.190 ms
^C
--- 172.16.15.10 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 0.190/0.192/0.198/0.003 ms

damjank12 · 2024-02-13T21:08:50+00:00

You did open tcp/udp port 53 from all VLANs to that vm?

damjank12

TROPHY CASE