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Is there a good email server that can be run through Docker? (lemmy.ca)

submitted 4 months ago* (last edited 4 months ago) by hackysphere@lemmy.ca to c/selfhosted@lemmy.world

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I need to run my own email server for some of my domains, because the providers that I usually use don't support them (they use Unicode characters, and not everyone supports that yet). I have a small VPS that I run a few Docker containers on, and I'm wanting to try and run an email server on it as well. What containers are good for a low-hassle email setup? I don't need a mailbox webui (ex: roundcube), but it would be nice to have a UI for management. I do need multi-domain support, however.

EDIT: For anyone wondering, I decided to go with Mailu. Stalwart didn't play will with internationalized domains (although it was the only server to support EAI/SMTPUTF8), and Mailcow would have been a bit more difficult for me to change to bind mounts and reconfigure Docker networking with.

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[–] moonpiedumplings@programming.dev 7 points 4 months ago* (last edited 4 months ago) (3 children)

Have you considered that the reason why your mail server is trusted is because it's been around for 20 years?

Have you tried to set up mail from scratch on a new domain/ip recently?

[–] Shimitar@downonthestreet.eu 2 points 4 months ago

To be honest it's mostly FUD. Self host email is perfectly doable provided that:

you don't use your home IP
you do DNS records correctly
you do DKIM & DMARC correctly
you don't send spam

What happened to me over the years was having the subnet my ip was is being associated to spammers, and that was a problem. It took several iterations with blacklists and my provider to get it sorted. That's why I recommend using a reputable service provider that take care of spammers in a timely manner.

[–] lukecyca@lemmy.ca 2 points 4 months ago (1 children)

I've been running my own email server for 15+ years. One year ago I needed to change VPS providers and thus get a totally different IP. I worried about this a bit, but actually had no issues whatsoever. Of course, I wasn't starting completely from scratch as I had the same domain, all my personal experience, and a battle-tested configuration for docker-mailserver. But yeah, the lack of IP reputation itself didn't seem to be an issue at all. Maybe I got lucky. Or maybe it's because I chose a relatively small Canadian VPS provider rather than one of the global cloud giants (I assume their IP address space gets pretty trashed with scammers).

[–] moonpiedumplings@programming.dev 2 points 4 months ago

What about domain reputation?

[–] Shimitar@downonthestreet.eu 1 points 4 months ago* (last edited 4 months ago)

Yes, I migrated IP (from one provided to another) last year, and I recently added a new domain as well.

The new domain on the new ip just works, and the old domain on the same new ip just keep working.

Both the old and new ip are not residential IPs, I rent a small dedicated server for this purpose on the major hoster of my country. I pay about 15€/month for that, but it's not only used for email, for all my services.