Thread Info
  • State Suggested Answer
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 4 subscribers
  • Views 3692 views
  • Users 0 members are here
Options
Suggested
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Two WAN connections, sendings mail via SMTP fails

Benedikt Huss

Hi,

until last week, we used to have one main WAN connection (120 Mbit/s) and a second WAN connection (20 MBit/s) which was configured to become active in case of connection errors for our main connection. We had no problems sending mails using an external mail server (we don't have any mail servers inside our local network). 

Last week our second connection was upgraded to 100 Mbit/s and we decided to use both connection simultaneously. As soon as the second connection is active, sending mails via SMTP fails (our NAS is not able to send a mail, I only get an error code). I tried to create a multipath rule for SMTP, but that did not seem to help.

Any idea whats wrong there?

Regards,

Benedikt



This thread was automatically locked due to age.
  • 0

    Can you send a screenshot of your multipath rule?

    Managing several Sophos firewalls both at work and at some home locations, dedicated to continuously improve IT-security and feeling well helping others with their IT-security challenges.

  • 0

    seems your provider only accepts mails from your first primary wan link. contact provider so that he will allow second wan link to deliver smtp also.

    multipath is only workaround here to use one link for smtp.

     

    greets

    zaphod
    ___________________________________________

    Home: Zotac CI321 (8GB RAM / 120GB SSD)  with latest Sophos UTM
    Work: 2 SG430 Cluster / many other models like SG105/SG115/SG135/SG135w/...

  • 0 in reply to zaphod

    The problem was caused by the router used for the second connection. It allowed only connections to some mail-servers. As soon as I added our mail-server to that list, mails can be send using both interfaces.

Unfiltered HTML