Issues when try block incoming domains

[pablo.canales]

Hi, y follow this tutorial https://blog.zimbra.com/2017/09/block-i ... s-domains/ to block domain 'qq.com' in my Zimbra Server but doesn't work.
I created the file /opt/zimbra/common/conf/postfix_reject_sender and in the file enter this:

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qq.com REJECT

I saved the file and execute the command:

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zmprov ms 'mail.mydomain.com' +zimbraMtaSmtpdSenderRestrictions "check_sender_access lmdb:/opt/zimbra/common/conf/postfix_reject_sender"

and postmap it

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/opt/zimbra/common/sbin/postmap /opt/zimbra/common/conf/postfix_reject_sender

I wait some minute to do this:

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zmmtactl restart

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Rewriting configuration files...done.
Stopping saslauthd...done.
Starting saslauthd...done.
/postfix-script: refreshing the Postfix mail system

But doesn't work
I tried to do again the process but when do:

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zmprov ms 'mail.mydomain.com' +zimbraMtaSmtpdSenderRestrictions "check_sender_access lmdb:/opt/zimbra/common/conf/postfix_reject_sender"

The server tell me this:

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ERROR: account.INVALID_ATTR_VALUE (invalid attr value: invalid attr value - unable to modify attributes: ldap host=mail.mydomain.com:389: attribute 'zimbraMtaSmtpdSenderRestrictions' cannot have multiple values

I'm stuck Someone can help me?

[DennisT]

I'm stuck with the same issue. Google isn't helping.

[DennisT]

I was able to work around this issue another way. See this thread:
viewtopic.php?f=15&t=67078&p=293731#p293731