Default mail attachment size in iredmail is 10 MB. To increase mail attachment size, login to server as user root, run following commands postconf -e message_size_limit=104857600 postconf -e mailbox_size_limit=104857600 systemctl restart postfix Here 104857600 is 100 MB in bytes (100 * 1024 * 1024). Change this as required. Sending very large file using mail attachment … Read more
On Zimbra mail server, webmail stopped working on Port 80/443. Admin interface worked properly on url https://hostname:7071/. There is no errors displayed under monitor tab of Zimbra Admin. To fix, run su – zimbra zmprov ms `zmhostname` zimbraReverseProxySSLToUpstreamEnabled FALSE zmprov ms `zmhostname` zimbraMailMode both zmprov ms `zmhostname` zimbraReverseProxyMailMode both ./libexec/zmproxyconfig -e -w -o -a 8080:80:8443:443 … Read more
On CentOS 7 server with firewalld running, used following command to open ports used by Zimbra Mail Server. firewall-cmd –zone=public –permanent –add-service=http firewall-cmd –zone=public –permanent –add-service=https firewall-cmd –zone=public –permanent –add-service=ssh firewall-cmd –zone=public –permanent –add-port=110/tcp firewall-cmd –zone=public –permanent –add-port=11211/tcp firewall-cmd –zone=public –permanent –add-port=143/tcp firewall-cmd –zone=public –permanent –add-port=25/tcp firewall-cmd –zone=public –permanent –add-port=443/tcp firewall-cmd –zone=public –permanent –add-port=465/tcp firewall-cmd … Read more
After Zimbra mail server installed, webmail work on url https://SERVER-HOSTNAME-HERE/ If you access webmail with out HTTPS, it won’t work. To set HTTP to redirect to HTTPS, login to server as root, switch to user zimbra su – zimbra Run zmprov ms SERVER_HOSTNAME_HERE zimbraReverseProxyMailMode redirect Wait few minutes, HTTP link will redirect to HTTPS. [root@correo … Read more
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 To make SSL active, you … Read more
https://sendpulse.com – Free upto 500 subscribers. https://convertkit.com – Free upto 1000 subscribers. https://mailchimp.com – Free upto 2000 subscribers. https://www.gmass.co – Allow you to send mass email using Gmail and G Suite. OpenEMM – Install instructions. https://yamm.com https://www.klaviyo.com – email marketing https://github.com/AfterShip/email-verifier – email verifier https://www.lemlist.com/cold-email-templates – Cold Email Templates. Find Email https://anymailfinder.com – find email … Read more
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 v=DMARC1;p=POLICY_HERE;pct=100;rua=mailto:postmaster@your-domain.com;ruf=mailto:admin@your-domain.com;rf=afrf 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
To disable IPv6 on the postfix mail server, edit vi /etc/postfix/main.cf Find inet_protocols = all Replace with inet_protocols = ipv4 Restart postfix systemctl restart postfix Method 2 postconf -e inet_protocols=ipv4 systemctl restart postfix To see the current configuration, run [root@server ~]# postconf inet_protocols inet_protocols = ipv4 [root@server ~]#
Install postfix apt update apt install postfix libsasl2-modules Create file touch /etc/postfix/sasl_passwd chmod 600 /etc/postfix/sasl_passwd vi /etc/postfix/sasl_passwd Add [smtp.gmail.com]:587 user@gmail.com:password Save and exit editor. Run postmap /etc/postfix/sasl_passwd Edit postfix configuration file vi /etc/postfix/main.cf Find and remove relayhost = At end of the file, add relayhost = [smtp.gmail.com]:587 smtp_use_tls = yes smtp_sasl_auth_enable = yes smtp_sasl_security_options = … Read more
On installing SSL on the Zimbra mail server, i get the 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 which CA Certificate files are placed. Here is Zimba documentation related to this issue https://wiki.zimbra.com/wiki/Fix_depth_lookup:unable_to_get_issuer_certificate … Read more
To delete emails from a particular user from postfix mail queue, run postqueue -p | grep USER_HERE | cut -d’ ‘ -f1 | postsuper -d – See postfix
Migrate IMAP emails using imapsync Migrate Emails using imapcopy PHP script to test IMAP