How can I block an email by the sender's name?

[GlooM]

Hello!

I want to block the delivery of emails from any addresses by the sender's name.
For example:
"Webmaster" <name1@mail1.com>;
"Webmaster" <name2@mail2.com>;
"Webmaster" <name3@mail3.com>;

That is, regardless of the sender's mailbox address, the sender's name "webmaster" should be blocked.

As I understand it, there is no configurable spam filter for the domain in Zimbra. There is only the possibility to configure the filter directly in the users ' mailboxes. Apparently, this problem will have to be solved through configuring SpamAssasin. Tell me how to write a SA rule (in which file, the syntax of the rule, preferably with an example).

[porokh]

Hello!

If you really want to block incoming emails by sender's name, maybe the better way to do this is a Postfix Header Checks? Something like this:

Code: Select all

echo "/^From:.*Webmaster.*/ DISCARD" >>/opt/zimbra/conf/postfix_header_custom
zmprov mcf zimbraMtaHeaderChecks 'pcre:/opt/zimbra/conf/postfix_header_checks pcre:/opt/zimbra/conf/postfix_header_custom'
zmmtactl restart

Messages will be discarded during SMTP stage (i.e. without actual receiving a tons of garbage).

[simred]

Hello porokh,
does it works also for outgoing email filtering? I need to discard outgoing emails based on "Reply-to:" email header.

Tnx & br

Hello!

If you really want to block incoming emails by sender's name, maybe the better way to do this is a Postfix Header Checks? Something like this:

Code: Select all

echo "/^From:.*Webmaster.*/ DISCARD" >>/opt/zimbra/conf/postfix_header_custom
zmprov mcf zimbraMtaHeaderChecks 'pcre:/opt/zimbra/conf/postfix_header_checks pcre:/opt/zimbra/conf/postfix_header_custom'
zmmtactl restart

Messages will be discarded during SMTP stage (i.e. without actual receiving a tons of garbage).

[GlooM]

Hello!

If you really want to block incoming emails by sender's name, maybe the better way to do this is a Postfix Header Checks? Something like this:

Code: Select all

echo "/^From:.*Webmaster.*/ DISCARD" >>/opt/zimbra/conf/postfix_header_custom
zmprov mcf zimbraMtaHeaderChecks 'pcre:/opt/zimbra/conf/postfix_header_checks pcre:/opt/zimbra/conf/postfix_header_custom'
zmmtactl restart

Messages will be discarded during SMTP stage (i.e. without actual receiving a tons of garbage).

Hi Porokh!

Thank you very much! In fact, I don't care what kind of tool to implement the blocking. The fact of blocking is important to me. Postfix Header Checks are absolutely fine for me. Tell me, will your example ("/^From:.*Webmaster.*/ DISCARD") work for a different word format? For example, Webmaster, webmaster, WEBMASTER?

[porokh]

Hello porokh,
does it works also for outgoing email filtering? I need to discard outgoing emails based on "Reply-to:" email header.

Hello, simred!

Yes, postfix header checks works for outgoing messages too; I use it for hiding my internal IP, like this:

Code: Select all

/^Received: .*192\.168\.\123\.\d+\.*/ IGNORE

[porokh]

Thank you very much! In fact, I don't care what kind of tool to implement the blocking. The fact of blocking is important to me. Postfix Header Checks are absolutely fine for me. Tell me, will your example ("/^From:.*Webmaster.*/ DISCARD") work for a different word format? For example, Webmaster, webmaster, WEBMASTER?

Hello, GlooM!

As stated in header_checks man (http://www.postfix.org/header_checks.5.html): "By default, regexp: and pcre: patterns are case insensitive." so any case combinations will be matched.

[barrydegraaff]

You can also do this with Sieve:
https://github.com/Zimbra-Community/zim ... r/Sieve.md