Sporadic connectivity issues with GMAIL SMTP server with Sonicwall TZ210
Posted on 2011-10-13
On Monday night I installed a new TZ210 sonicwall to replace a TZ170. Our company utilizes GMAIL for corporate email. I am now having a sporadic issue where internal network devices that need to contact the GMAIL SMTP server work and then stop and then work again.
It is totally random how long the equipment will work. The office copier/scanner will send scanned documents for hours and then it we get an error where the SMTP server cannot be reached.
The non-authenticated server for gmail is: aspmx.l.google.com
Even when the scanner cannot reach the SMTP server. This also occurs randomly with the Sonicwall when trying to dump the email logs.
I can telnet on port 25 it still. The firewall is not blocking the traffic.
It is basic port 25 traffic as the scanner won't support SSL.
I have checked with Sonicwall tech support and they have verified my configuration on the firewall as well as stated that there are no known issues with the model. I am running the latest firmware. I did the upgrade last night after the initial config on Monday night to see if it would help.
I have also contacted Google support, but after their initial canned response on Tuesday, I have had zero feedback from them.
Has anyone seen this happen with google before or with a sonicwall device? I found one other old posting of someone saying it was sporadic, but the question was never followed up on with a permanent solution.