Recently after adding a 3rd Web server to a SharePoint 2013 SP1 farm incoming emails getting stuck (in Drop folder) time to time. I've checked few threads already like these (1, 2 and 3).

Restarting SharePoint Timer Service in all WFE servers seem to resume emails flow most of time. A number of times it appears I need to wait over night for the emails to be picked up. May be "Timer Service recycle" over night helps? Also everytime emails are stuck it appears to be the same WFE server. 

We've configured Incoming emails as per this Technet article following "basic scenario" and SMTP and IIS configured on all WFE servers. Now my question is whether "advanced scenario" is required for multi-server farm? Any suggestion/ comment would be appreciated! 

Thanks in adv

Hi,

As I understand, you want to know if "advanced scenario" is required for multi-server farm in SharePoint 2013.

The advanced scenario is not required for multi-server farm.  If you want more additional choices, you could choose the advanced scenario.

It has described how to decide whether to use a basic or advanced scenario in the article below.

The article below is about key decisions for planning incoming e-mail.

https://technet.microsoft.com/en-us/library/cc263260.aspx#section2

Best regards,

Sara Fan