Python Win32com Outlook 2013 Sendusingaccount Return Exception

While working on a simple mail automation with python and win32com api, I had an issue with SendUsingAccount. It was ignored or, worse, generating an error when I upgraded from win

Solution 1:

So, I found the solution to my problem by chance on this thread at the very bottom (most of it is for VBA but the last post solved the python issue).

Here is the working code

import win32com.client

o = win32com.client.Dispatch("Outlook.Application")
oacctouse = None
for oacc in o.Session.Accounts:
    if oacc.SmtpAddress == "sender@mail.com":
        oacctouse = oacc
        break
Msg = o.CreateItem(0)
if oacctouse:
    Msg._oleobj_.Invoke(*(64209, 0, 8, 0, oacctouse))  # Msg.SendUsingAccount = oacctouse

ifto:
    Msg.To = ";".join(to)
if cc:
    Msg.CC = ";".join(cc)
if bcc:
    Msg.BCC = ";".join(bcc)

Msg.HTMLBody = ""

Msg.Send()

Solution 2:

For others not having luck seeing their secondary account name show up under the "for oacc in o.Session.Accounts:" loop: try using Msg.SentOnBehalfOfName = '2ndaryemail@mail.com' . This worked for me!