Unfortunately JIRA couldn't connect to the mail server. mail server said: "AUTHENTICATE failed."

Question

When try to setup the email address, getting the above Authentication Error. However, using the email address credential, I can able to connect with webmail.

Adding to more points, currently, I have 8 JSD projects with email setup. Email setting for all of them working fine but facing issue with one email address.

I already gone through the troubleshooting documents but not no luck :-(

Here is the full error message

Unfortunately JIRA couldn't connect to the mail server. Here is what the mail server said: "AUTHENTICATE failed." Check out our troubleshooting docs for help resolving the issue.

Nic Brough -Adaptavist- · Answer

You should check the mail server log to see why it is rejecting you, and maybe get more data in the Jira logs by following the troubleshooting doc above.

Shekhar Sarker_m0ida3 · Answer

I try but it doesn't work.

My other mail boxes are working fine but don't understand only one mail box facing this issue. However, using the outlook/webmail, I can easily login without any authentication failed. So, there shouldn't be any issue with credential.

Brant Schroeder · Answer

I had this issue before and I changed the password on the email account and reentered all of the information and everything began working again.  Try this and see what happens.