How to configure the correct display of tables from email in redmine?

Question

Ruby on Rails

When processing email, if the letter contains a table, then the table "breaks" and in the task the contents of the table are displayed as text in a column.
html letter format. Version redmine 2.6.0.stable, similar behavior in 3.4.6.
How to set up correct display/processing of tables from email in redmine?
Table in the original email:

How it looks after redmine has processed the email and added it to the task:

1

2

3

4

5

a

b

c

d

e

asdasd

,..,/,./.,

asdasdsd

xzcxczc

retete