421 server busy. Try again later - New error, no mail arrive on our mail server

seems the used AV engine won't work correctly.

try the following

- switch SMTP to "single scan"

if problems occur again: 

- change the AV engine for single-scan

(management / system settings / scan settings / single-scan-engine)

also a reboot of FW would help.

otherwise contact sophos support.

Thanks for your reply.

I'm already in single scan for SMTP and AV

I've contacted Sophos support in France. I think i must now wait ( long time ? ) come feedback ......

David,

what version are you on?

Thanks

Virtual Version

SFV2C4 (SFOS 15.01.0 MR-3)

Sophos French support told me to update to v16 firmware and reopen a case if the problem occur a second time ....

what is this reply ?????!!!!!!!!!!

Hi David,

Please provide me the case# in support so that I can monitor the case personally and update you. Apologies for the experience, you can always feel free to DM me over any such instances further. I will be happy to help :)

Meanwhile, check #1 in my guide here, do you catch any drop logs?

Thanks

I'm DAVID with new account.

Please, i know why the problem occured, this process is at 100% since the SMTP BUG.

6194  20   0  223m  11m 2492 S 99.7  0.3  33375:33 awarrensmtp

Problem solved.

I've killed the process and restart the service with GUI