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I have run my own mail server since maybe 1995? As is the case with most things I have learned how to do with computers, there are a few guidelines to follow (
by raintrees 4y ago
I have run my own mail server since maybe 1995? As is the case with most things I have learned how to do with computers, there are a few guidelines to follow (SPF, PTR record, etc.) and it helps to have a static IP from your ISP, although not necessary - I have several clients still hosting email using DDNS.
You may wish to consider using something like a Synology NAS where a stripped down mail server is a free feature for 5 mailboxes or less. They also support DDNS...
And when spam levels get high, a quick analysis of source IP addresses gives me new entries for a block list at my firewall. I wrote a simplistic visual basic script to harvest the IP addresses, since I still use Outlook as my PIM.
- timbit42 4y agoHow do you manage a dynamic IP? Do you whitelist the entire subnet? If not, do you update the DNS records every time the IP changes?
- raintrees 4y agoI am referring to the client having a dynamic IP connection with their ISP - The client's IP address may change for their email server. So DDNS service providers (i.e. ChangeIP, etc.) handle DNS for those - An application locally installed for the client (Synology offers one for their NAS devices, for example) polls the public IP every few minutes (or some frequency), then reaches out to the DDNS provider with any updates, that provider in turn updates DNS so the rest of the world "sees" the email server at the new address.