I have discovered in CRM when configuring the IMAP email integration, Zoho only supports the PLAIN or LOGIN smtp authentication methods when communicating with any email server. We know this because during communication the zoho server asks for capabilities to the email server. CRM then reports “No login methods found”. However, when configuring an email relay in CRM, this is not the case and DIGEST or CRAM MD5 are supported and the relay is successfully added. Why is there is a difference in authentication methods used between these two services? Because, if you are using PLAIN or LOGIN for smtp authentication, your email account usernames / passwords are stored in logs and can easily be decrypted with any online base64 decoder. OAuth is becoming more popular but is not widely adapted yet. So, for now, DIGEST and CRAM MD5 through an encrypted tunnel are the preferred methods.

We refuse to turn on PLAIN or LOGIN to use the email IMAP synchronization feature because of this. Could it be as simple as turning it on in your backend?

Regards,

Drew