Restict Outgoing Mails

[pandiyanmaruthu]

Hello Team,

Is it possible to restrict sending mails to the gmail for all users zimbra. Except Gmail we need to send emails to other domains.

[fbzimblet]

you can blacklist gmail domains

[iomarmochtar]

These following steps is for blocking gmail.com as recipient.

(run as zimbra user)
- Edit recipient restriction file

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vim /opt/zimbra/conf/zmconfigd/smtpd_recipient_restrictions.cf

- Add this line before permit_sasl_authenticated

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check_recipient_access lmdb:/opt/zimbra/conf/reject_list

note: you may change lmdb with hash if you are using old zimbra version

- Edit reject list file with domain/user that you want to block as recipient

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vim /opt/zimbra/conf/reject_list

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gmail.com REJECT

- create db file for reject list file

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postmap /opt/zimbra/conf/reject_list

- Reload zimbra mta service

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zmmtactl reload