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Configure Zimbra to use SendGrid as Smarthost

Rumi, February 18, 2023September 12, 2023

Switch to user Zimbra

su zimbra

Add credentials to relay_password file:

nano /opt/zimbra/conf/relay_password

Add:

smtp.sendgrid.net yourSendGridUsername:yourSendGridPassword

Apply configuration to Zimbra

postmap /opt/zimbra/conf/relay_password
postmap -q smtp.sendgrid.net /opt/zimbra/conf/relay_password
zmprov ms `zmhostname` zimbraMtaSmtpSaslPasswordMaps lmdb:/opt/zimbra/conf/relay_password
zmprov ms `zmhostname` zimbraMtaSmtpSaslAuthEnable yes
zmprov ms `zmhostname` zimbraMtaSmtpCnameOverridesServername no
zmprov ms `zmhostname` zimbraMtaSmtpTlsSecurityLevel may
zmprov ms `zmhostname` zimbraMtaSmtpSaslSecurityOptions noanonymous
zmprov ms `zmhostname` zimbraMtaRelayHost smtp.sendgrid.net:587

Now wait for a couple of minutes and start testing it by sending out some test mails. Follow the log file to see if it works or not:

tail -f /var/log/zimbra.log

To undo, apply the command

zmprov ms `zmhostname` zimbraMtaRelayHost ""
Administrations Configurations (Linux) PostfixSendgridzimbra

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

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