Get-RemoteSmtpServers

Get-RemoteSmtpServers.ps1

Fetch all remote SMTP servers from Exchange receive connector logs

Description

This scripts fetches remote SMTP servers by searching the Exchange receive connector logs for the EHLO string. Fetched remote servers can be exported to a single CSV file for all receive connectors across Exchange Servers or exported to a separate CSV file per Exchange Server.

Requirements

• Exchange Server 2010, Exchange Server 2013+

Parameters

Servers

List of Exchange servers, modern and legacy Exchange servers cannot be mixed

ServersToExclude

List of host names that you want to exclude from the outout

Backend

Search backend transport (aka hub transport) log files, instead of frontend transport, which is the default

LegacyExchange

Search legacy Exchange servers (Exchange 2010) log file location

ToCsv

Export search results to a single CSV file for all servers

ToCsvPerServer

Export search results to a separate CSV file per servers

UniqueIPs

Simplify the out list by reducing the output to unique IP address

AddDays

File selection filter, -5 will select log files changed during the last five days. Default: -10

Examples

.\Get-RemoteSmtpServers.ps1 -Servers SRV01,SRV02 -LegacyExchange -AddDays -4 -ToCsv

Search legacy Exchange servers SMTP receive log files for the last 4 days and save search results in a single CSV file

.\Get-RemoteSmtpServers.ps1 -Servers SRV03,SRV04 -AddDays -4 -ToCsv -UniqueIPs

Search Exchange servers SMTP receive log files for the last 4 days and save search results in a single CSV file, with unique IP addresses only

Note

THIS CODE IS MADE AVAILABLE AS IS, WITHOUT WARRANTY OF ANY KIND. THE ENTIRE RISK OF THE USE OR THE RESULTS FROM THE USE OF THIS CODE REMAINS WITH THE USER.

Credits

Written by: Thomas Stensitzki | MVP

Related blog post: https://granikos.eu/fetch-remote-smtp-servers-connecting-to-exchange/

Stay connected

• My Blog: https://blog.granikos.eu
• Bluesky: https://bsky.app/profile/stensitzki.bsky.social
• LinkedIn: https://www.linkedin.com/in/thomasstensitzki
• YouTube: https://www.youtube.com/@ThomasStensitzki
• LinkTree: https://linktr.ee/stensitzki

For more Office 365, Cloud Security, and Exchange Server stuff checkout services provided by Granikos

• Website: https://granikos.eu
• Bluesky: https://bsky.app/profile/granikos.bsky.social