troubleshooting Question

Sonicwall - slow pop3 email sending and receiving

Avatar of johnbowden
johnbowdenFlag for Canada asked on
Software Firewalls
5 Comments1 Solution1847 ViewsLast Modified:
We recently had a problem with our Sonicwall TZ-170 router and it was replaced with a brand new unit. I upgraded the firmware to the latest version and then imported the configuration back into the unit. Current firmware version is as follows;
Model: TZ 170 Standard
Firmware Version: SonicOS Standard
ROM Version: SonicROM

We pull our email off of a server and we send our mail out through

Both sending and receiving mail is painfull and usually times out. We use Outlook 2000 SP3, workstation is running Windows XP SP2. The sonicall is doing the DHCP.

Network WAN settings are as follows;
WAN Interface Settings: Auto Negotiate  
Fragment non-VPN outbound packets larger than WAN MTU   (checked off)
WAN MTU:   1500

Now, because we needed to keep our email running, I've pulled the sonicwall and put in a little Netgear RP114 router and we don't have any problems with email transfer at all

I also have no problem telneting into either so the ports are working properly. We have this problem also when we use Outlook Express

Currently the MTU value 1500

Hope someone can help with this issue.


Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 5 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 5 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros