nesting a retry loop into a try except block python API

I have the following try except block that works well for me:

try:
    r = requests.post(endpoint,data=json.dumps(report_params),headers=headers)
    r.raise_for_status()
except requests.exceptions.HTTPError as errhttp:
    print ("Http Error:",errhttp)
    mbody = "The process encountered the following HTTP error: " + str(errhttp)
    sendmail(fromaddr, toaddr, msubject, mbody)
except requests.exceptions.ConnectionError as errconn:
    print ("Error Connecting:",errconn)
    mbody = "The process encountered the following connection error: " + str(errconn)
    sendmail(fromaddr, toaddr, msubject, mbody)
except requests.exceptions.Timeout as errtimeout:
    print ("Timeout Error:",errtimeout)
    mbody = "The process timed out after 3 tries and gave the error: " + str(errtimeout)
    sendmail(fromaddr, toaddr, msubject, mbody)
except requests.exceptions.RequestException as err:
    print ("No idea what the hell happened",err)
    mbody = "The process encountered the following unexpected error: " + str(err)
    sendmail(fromaddr, toaddr, msubject, mbody)

I would like to add a retry loop or function that retries 3 times on a connection error or timeout error

I have found something on SO that should work:

tries = 3
for i in range(tries):
    try:
        do_the_thing()
    except KeyError as e:
        if i < tries - 1: # i is zero indexed
            continue
        else:
            raise
    break

I am still learning try except blocks and therefore not very good at them. How could I put something like that loop inside the above block so that it looks like this:

try:
    r = requests.post(endpoint,data=json.dumps(report_params),headers=headers)
    r.raise_for_status()
except requests.exceptions.HTTPError as errhttp:
    print ("Http Error:",errhttp)
    mbody = "The process encountered the following HTTP error: " + str(errhttp)
    sendmail(fromaddr, toaddr, msubject, mbody)
except requests.exceptions.ConnectionError as errconn:

#### RETRY 3 TIMES AND IF SUCCESSFUL, CONTINUE TO NEXT EXCEPT STATEMENT.  IF UNSUCCESSFUL, SEND THE EMAIL

    print ("Error Connecting:",errconn)
    mbody = "The process failed to connect after 3 tries and gave the following error: " + str(errconn)
    sendmail(fromaddr, toaddr, msubject, mbody)
except requests.exceptions.Timeout as errtimeout:

#### RETRY 3 TIMES AND IF SUCCESSFUL, CONTINUE TO NEXT EXCEPT STATEMENT.  IF UNSUCCESSFUL, SEND THE EMAIL

    print ("Timeout Error:",errtimeout)
    mbody = "The process timed out after 3 tries and gave the error: " + str(errtimeout)
    sendmail(fromaddr, toaddr, msubject, mbody)
except requests.exceptions.RequestException as err:
    print ("No idea what the hell happened",err)
    mbody = "The process encountered the following unexpected error: " + str(err)
    sendmail(fromaddr, toaddr, msubject, mbody)

Thank you!