Postfix SMTP sends from wrong email address

[RolandG]

I have a domain "example.com" and "example2.com". example.com has email address admin@example.com and the other one no-reply@example2.com.
Now when I login to no-reply@example2.com:25, postfix sends the email from no-reply@exmaple.com. As you can see it takes no-reply@ and sends it from the first domain rather the second one.
I even removed the first domain but still it sends from example.com.

Any idea?

 

[abdi]

Is example.com the hostname of your server? You can find out by running

hostname

 

[RolandG]

Is example.com the hostname of your server? You can find out by running

hostname

Yes the hostname contains example.com. I changed the hostname on the sysconfig file and on plesk but the problems still persists.