Some email programs let you specify the authentication method - the typical authentication types are:
| Authentication Method | Compatibility | |
|---|---|---|
| PLAIN / PLAIN TEXT |
|
|
| CRAM-MD5 |
|
|
| DIGEST-MD5 |
|
|
| NTLM |
|
Of these we would recommend CRAM-MD5 - if that does not work try DIGEST-MD5 or PLAIN TEXT. NTLM authentication is not currently compatible with AuthSMTP.
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