Voicemail to Email - Testing SMTP mail server authentication

When setting up voicemail to email on an Avaya IP Office linux application server. If authentication is required then the below process can help when testing the SMTP server connection.

To test connectivity and credentials on an SMTP server:

Using Putty or another Telnet client
1) Create a telnet connection to <your mail server domain> on port 25 and then open the connection.
NB. Commands are sometimes not recognised on the first attempt and may need repeating.
2) Type EHLO <your mail server domain> and then press ENTER.
SMTP server will respond
3) Type HELO <your mail server domain> and then press ENTER.
SMTP server will respond
4) Type HELP and then press ENTER.
SMTP server will respond with available commands (check for MAIL and RCPT)
5) Type AUTH LOGIN and then press ENTER.
The server responds with an encrypted prompt for your user name.
6)Enter your username encrypted in base 64. Many tools available to encode – e.g. https://www.base64encode.org/
The server responds with an encrypted base 64 prompt for your password.
7) Enter your password encrypted in base 64.
If credentials are correct you will be authenticated.
8) Type MAIL FROM:<sender@domain.com>, and then press ENTER.
SMTP server will respond
9) Type RCPT TO:<recipient@remotedomain.com>,and then press ENTER.
SMTP server will respond

This helped me to resolve an issue when setting up voicemail to email with authentication on an Avaya IP Office Application Server.

I hope other find it of use.

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