I
Isaac Oben
Hello
I had same issue and ISP said they are not blocking, The I requested to speak to a higher level tech and they said they need to open port 25 from their end..So check with them to see if they have port 25 going out blocked or if they are using a different port to route mail externally, if so then you may need to change this on your external send connector. I will be suprise if this have anything to do with Cisco
Isaac Oben MCITP:EA, MCSE
I had same issue and ISP said they are not blocking, The I requested to speak to a higher level tech and they said they need to open port 25 from their end..So check with them to see if they have port 25 going out blocked or if they are using a different port to route mail externally, if so then you may need to change this on your external send connector. I will be suprise if this have anything to do with Cisco
Isaac Oben MCITP:EA, MCSE