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This is actually frustrating, e.g. with a large power outage when you expect an important message. I run my mailhost (single-node) since 2005 and I thought that

This is actually frustrating, e.g. with a large power outage when you expect an important message. I run my mailhost (single-node) since 2005 and I thought that I need HA more than once or twice. Sadly, I haven't figured out a proper fully-redundant solution. Syncing mailboxes with e.g. Syncthing is way too fragile. Recently, I wanted to experiment with DBMail + CockroachDB cluster but haven't yet found time for that. Never found any MRA that uses document-oriented database like RethinkDB; and GlusterFS is way too sensitive to high latencies - so DBMail+CRDB looks like the only readily accessible option sans of trying more "raw" programmable solutions like Salmon or Haraka and writing own storage backend.

andris9 9y ago
Redundancy requirement was one of the reasons I started building WildDuck mail server. It can be set up with no-spof components, everything can be replicated. https://github.com/nodemailer/wildduck#no-spof-architecture https://github.com/nodemailer/wildduck#no-spof-architecture
- drdaeman 9y ago
  Whoa! That's very interesting, thanks a lot! Haven't seen this project before - and I've tried to search for mail servers using document-oriented DBs, although not sure if I've searched specifically for MongoDB. Will definitely take a look.
  - andris9 9y ago
    I guess the project is too new and it is hard to stand out amongst other players that have been around for 20 years by now. Even though not having been around so long has advantages as well, for example it allows skipping non-needed features and adding new stuff like full unicode support – I host андрис@уайлддак.орг on my WildDuck test instance (even though I can only communicate with Gmail using this address, other servers either refuse my messages or do not send to such address).
quicksilver03 9y ago
Dovecot has an excellent implementation of 2-way synchronization of mailboxes: run Dovecot on 2 different servers in different physical locations, set up MX records and a SMTP software on both servers and you have your HA solution.
- drdaeman 9y ago
  Built-in sync causes accidental message duplication in shared folders. Or, at least, it did last time I've tried it, some years ago. (But maybe I should review and simplify my mailbox/account structure... It grew quite messy at the moment.)

andris9 9y ago

Redundancy requirement was one of the reasons I started building WildDuck mail server. It can be set up with no-spof components, everything can be replicated. https://github.com/nodemailer/wildduck#no-spof-architecture https://github.com/nodemailer/wildduck#no-spof-architecture

drdaeman 9y ago
Whoa! That's very interesting, thanks a lot! Haven't seen this project before - and I've tried to search for mail servers using document-oriented DBs, although not sure if I've searched specifically for MongoDB. Will definitely take a look.
- andris9 9y ago
  I guess the project is too new and it is hard to stand out amongst other players that have been around for 20 years by now. Even though not having been around so long has advantages as well, for example it allows skipping non-needed features and adding new stuff like full unicode support – I host андрис@уайлддак.орг on my WildDuck test instance (even though I can only communicate with Gmail using this address, other servers either refuse my messages or do not send to such address).

quicksilver03 9y ago

Dovecot has an excellent implementation of 2-way synchronization of mailboxes: run Dovecot on 2 different servers in different physical locations, set up MX records and a SMTP software on both servers and you have your HA solution.

drdaeman 9y ago
Built-in sync causes accidental message duplication in shared folders. Or, at least, it did last time I've tried it, some years ago. (But maybe I should review and simplify my mailbox/account structure... It grew quite messy at the moment.)