# Zimbra - HaProxy

**URL:** <https://discourse.haproxy.org/t/zimbra-haproxy/2407>\
**Category:** Help!\
**Created:** [April 24, 2018, 12:40pm UTC](https://discourse.haproxy.org/t/zimbra-haproxy/2407 "2018-04-24T12:40:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![brandon](https://avatars.discourse-cdn.com/v4/letter/b/f08c70/32.png) [@brandon](https://discourse.haproxy.org/u/brandon)\
**Post date:** [April 24, 2018, 12:40pm UTC](https://discourse.haproxy.org/t/zimbra-haproxy/2407/1 "2018-04-24T12:40:15Z")

</div>

My configuration on haproxy:

> global  
> log /dev/log local0  
> log /dev/log local1 notice  
> chroot /var/lib/haproxy  
> user haproxy  
> group haproxy  
> daemon
> 
> defaults  
> option dontlognull # Do not log connections with no requests  
> option redispatch # Try another server in case of connection failure  
> option contstats # Enable continuous traffic statistics updates  
> retries 3 # Try to connect up to 3 times in case of failure  
> timeout connect 5s # 5 seconds max to connect or to stay in queue  
> timeout http-keep-alive 1s # 1 second max for the client to post next request  
> timeout http-request 15s # 15 seconds max for the client to send a request  
> timeout queue 30s # 30 seconds max queued on load balancer  
> timeout tarpit 1m # tarpit hold tim  
> backlog 10000 # Size of SYN backlog queue  
> balance roundrobin # load balancing algorithm  
> mode tcp # protocol analyzer  
> option tcplog # log format  
> log global # log activation  
> timeout client 300s # client inactivity timeout  
> timeout server 300s # server inactivity timeout  
> default-server inter 3s rise 2 fall 3 # default check parameters
> 
> frontend Exchange\_FrontEnd\_HTTP  
> bind 192.168.201.15:80 name web  
> maxconn 10000  
> default\_backend Exchange\_BackEnd\_HTTP
> 
> backend Exchange\_BackEnd\_HTTP  
> server SRV-EX01 192.168.201.235:80 maxconn 10000 check  
> p
> 
> frontend Exchange\_FrontEnd\_SSL  
> bind 192.168.201.15:443 name ssl  
> maxconn 10000  
> default\_backend Exchange\_BackEnd\_SSL
> 
> backend Exchange\_BackEnd\_SSL  
> server SRV-EX01 192.168.201.235:443 maxconn 10000 check  
> p
> 
> frontend Exchange\_FrontEnd\_SMTP25  
> bind 192.168.201.15:25 name smtp  
> maxconn 10000  
> default\_backend Exchange\_BackEnd\_SMTP25
> 
> backend Exchange\_BackEnd\_SMTP25  
> server SRV-EX01 192.168.201.235:25 maxconn 10000 check
> 
> frontend Exchange\_FrontEnd\_SMTP\_Secure  
> bind 192.168.201.15:465 name smtpssl  
> maxconn 10000  
> default\_backend Exchange\_BackEnd\_SMTP\_Secure
> 
> backend Exchange\_BackEnd\_SMTP\_Secure  
> server SRV-EX01 192.168.201.235:465 maxconn 10000 check
> 
> frontend Exchange\_FrontEnd\_IMAP  
> bind 192.168.201.15:143 name imap  
> maxconn 10000  
> default\_backend Exchange\_BackEnd\_IMAP
> 
> backend Exchange\_BackEnd\_IMAP  
> server SRV-EX01 192.168.201.235:143 maxconn 10000 check
> 
> frontend Exchange\_FrontEnd\_IMAP\_Secure  
> bind 192.168.201.15:993 name imapssl  
> maxconn 10000  
> default\_backend Exchange\_BackEnd\_IMAP\_Secure
> 
> backend Exchange\_BackEnd\_IMAP\_Secure  
> server SRV-EX01 192.168.201.235:993 maxconn 10000 check

but does not receive mail. sends but does not receive e-mails  
how to improve this configuration on balancing  
Does zimbra work with haproxy? is this possible? configuration in zimbra?