Install SSL Certificate on Zimbra mail server

Zimbra SSL install

To install SSL certificate for Zimbra Mail Server, login to server, switch to user zimbra

Now create file commercial.key, paste your Private key.

In commercial.crt, paste your SSL certificate.

Create commercial_ca.crt with content of your ca-bundle file.

Verify SSL cerificate

If SSL verified sucessfully, you can install it with command […]

Read More…

DMARC

DMARC is used to protect your email from email spoofing. DMARC use SPF and DKIM record to validate your email. DMARC is a TXT record added in your domain DNS. DMARC record look like

p=POLICY_HERE This specifies what to do with incoming email that fails DMARC. Valid options are none, quarantine and reject. p=none […]

Read More…

Postfix disable IPv6

To disable IPv6 on postfix mail server, edit

Find

Replace with

Restart postfix

Method 2

[…]

Read More…

Configure postfix to relay mails using Gmail

Install postfix

Create file

Add

Save and exit editor. Run

Edit postfix configuration file

Find and remove

At end of the file, add

Restart postfix

Now all mails will be forwarded using gmail. Test Email Delivery Install mailutils

On CentOS

To sent test email, run […]

Read More…

Zimbra Unable to validate certificate chain

zimbra

On installing SSL on Zimbra mail server, i get following error

This was due to SSL cert chain. The ca-bundle file they provided did not work with Zimbra. This is due to some issue with the order in witch CA Certificate files are placed. Here is zimba documentaion related to this issue https://wiki.zimbra.com/wiki/Fix_depth_lookup:unable_to_get_issuer_certificate I […]

Read More…

PowerMTA

PowerMTA is highly configurable mail server for email marketing. Unlike general email servers, PowerMTA can be configured to meet your special mail delivery requirements. To reload PowerMTA

PowerMTA config file location

To see mail queue status, run

List mails in queue

[…]

Read More…