I did not find how you can proxy mail to two different mail servers. Is it possible to do this? Example: mail1@example.com belongs to server1 and mail2@examle.com belongs to server2 server1 192.168.0.10 server2 192.168.10.20 server1 postfix server2 exchange

I just responded in the other thread, no, it’s not possibile with haproxy: [image] IMAP + SMTP proxy for 2 Mail Domains Help! You can’t. Haproxy does not know about SMTP or IMAP, and therefor cannot make load-balancing decision based on that. Also, the destination email …

Haproxy is not the right tool for this job. You need an SMTP relay (smarthost) capable of determining which host a destination mailbox resides on. If you had two such relays, you could use haproxy to load balance them, I suppose.

I tried a lot of options, unfortunately none of them works.

Unless you mean you’ve tried a lot of haproxy options–in which case, it can’t work–you need to be looking at changing the configuration on each of your existing mail servers so each is aware of which mailboxes reside on the other server. Look into Exchange “shared domain” documentation, for example. …

Большое спасибо, именно о диспетчере каталогов я и подумал. Попробую организовать центральное управление пользователями на основе OpenLDAP. Еще раз большое спасибо. Thank you very much.

I am in the process of moving and unfortunately the ISP that services the new location will only provide/rent 1 STATIC IP address. Currently I have a block of 5 IP address are utilized for pet projects. My pfSense box is connected to a semi-managed smart switch and to that is connected my VM Host …

No, this is not possible, for the reasons mentioned here: [image] IMAP + SMTP proxy for 2 Mail Domains Help! You can’t. Haproxy does not know about SMTP or IMAP, and therefor cannot make load-balancing decision based on that. Also, the destination email address is unknow…

Thanks for the reply. I want to be clear I am not looking for the level of granularity the OP was looking for of routing based on a users email address but rather the email domain. For example: imap(smtp).somedomainname1.com <---> pfSense/HA Proxy <---> 192.168.30.2 / NIC 3 / VM 3 imap(smtp).some…

I understand, but neither SMTP nor POP3 nor IMAP indicate the domain name in the first packet, which would be required to content switch it to different backend servers. Only in the case of implicit SSL can we actually use the hostname from the SSL client_hello SNI field for load-balancing decision…

Two mail servers

Help!

lukastribus March 26, 2020, 11:00am 2

I just responded in the other thread, no, it’s not possibile with haproxy:

Topic		Replies	Views
IMAP + SMTP proxy for 2 Mail Domains Help!	2	2765	March 26, 2020
SMTP & IMAP proxy based on domain (pass-through) Help!	4	13083	November 4, 2020
HAproxy wont send client IP to SMTP Help!	0	397	January 30, 2023
Postfix SMTPS HaProxy configuration Help!	3	6071	October 4, 2016
HAPROXY to sendmail server Help!	0	769	July 9, 2018

Two mail servers

Related topics