smtp_enforce_sync = true causes whm to show exim as down?

[dhabets]

I'd like to have smtp_enforce_sync = true, however by doing so it shows exim as down in the whm service page. It is up however.

Is there any way to resolve this?

 

[chirpy]

I doubt it since chkservd simply sends the commands to the port and by definition that command will cause problems. Do you have some specific requirement to use it? It's a rather obscure way to prevent spam. You could remove the exim checking from chkservd.

 

[dhabets]

Obscure, but perfectly within the specs. We've considering removing the check, but I haven't decided yet. For now I'm blocking port 25/26 for manually confirmed spammers/abusers's IPs and that works well.

 

[FeeL]

Other issues

I've changed my smtp_enforce_sync to true and no problems here...

I'd like to know if there's other problmes on doing it? Performance? mail crash? Mail relay?
Why this is "obscure"?

Thanks!

 

[webignition]

From looking at the Exim docs (http://exim.org/exim-html-4.50/doc/html/spec_14.html#IX1430), smtp_enforce_sync seems to make a lot of sense. But then I'm not too familiar with such things.

I'm also interested to hear why it is obscure.

 

[chirpy]

I theory that option is a very good idea. In practice, there are some MTA's that ignore that RFC requirement, so you do run the risk losing legitimate email.