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dnsPython use IP on interface

I use dsnPython in a project.
I use many resolvers same as explained at Set specific DNS server using dns.resolver (pythondns).
In order to send several requests I need to dispatch my request on many IPs.
I have some IPs on my interface eth0.
Do you know a way to send a request through an specific IP ?

It's possible by using resolvers and source attribute :
import dns.resolver
my_resolver.nameservers = ['8.8.8.8']
answer = my_resolver.query(
qname = fqdn_port,
source = '1.2.3.4',
)
8.8.8.8 is the resolver IP
1.2.3.4 is an IP of server

Send mail with smtplib using proxy

I have a very basic piece of Python code:
import smtplib
server = smtplib.SMTP(host, port)
problems = server.sendmail(from_addr, to_addr, message)
Is there solution to run it behind an HTTP proxy? I am using Python 3.4.1 on Linux with the http_proxy variable set.
Now I am getting a timeout from SMTP, but if I run this code from a proxy-free network, it works OK.

Is there solution to run it behind an HTTP proxy?
No, HTTP is a different protocol than SMTP and the proxy is for HTTP only. If you are very lucky you might be able to create a tunnel using the CONNECT command to the outside SMTP server, but usually the ports used for CONNECT are restricted so that you will not be able to create a tunnel to an outside host port 25 (i.e. SMTP).

python imaplib unexpected response 220

I have the following line of code using imaplib
M = imaplib.IMAP4('smtp.gmail.com', 587)
I get the following error from imaplib:
abort: unexpected response: '220 mx.google.com ESMTP o13sm12303588vde.21'
However from reading elsewhere, it seems that that response is the correct response demonstrating that the connection was made to the server successfully at that port.
Why is imaplib giving this error?

You are connecting to the wrong port. 587 is authenticated SMTP, not IMAP; the IMAP designated port number is 143 (or 993 for IMAPS).

I realized I needed to do IMAP4_SSL() - has to be SSL for IMAP and for using IMAP I need the IMAP server for gmail which is imap.googlemail.com. I ultimately got it work without specifying a port. So, final code is:
M = imaplib.IMAP4_SSL('imap.googlemail.com')

Connect to SMTP (SSL or TLS) using Python

I am attempting to connect to the Gmail SMTP mail server and perform tasks as outlined by the skeleton code given to me. Only the use of sockets is allowed (so not the smtplib). I need to: send HELO command, MAIL FROM, RCPT TO, and DATA.
There are many cases of similar problems posted, but they haven't received the proper answer. For example:
Implementing Transport Layer Security in Python - Simple Mail Client
The program is required to connect to smtp.gmail.com over port 587. I've taken two different approaches:
Using STARTTLS:
mailserver = 'smtp.gmail.com'
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((mailserver, 587))
recv = clientSocket.recv(1024)
print recv
if recv[:3] != '220':
print '220 reply not received from server.'
#Send HELO command and print server response
heloCommand = 'HELO Alice\r\n'
clientSocket.send(heloCommand)
recv1 = clientSocket.recv(1024)
print recv1
if recv1[:3] != '250':
print '250 reply not received from server.'
#Send MAIL FROM command and print server response.
command = "STARTTLS\r\n"
clientSocket.send(command)
recvdiscard = clientSocket.recv(1024)
print recvdiscard
clientSocket.send("MAIL From: email\r\n")
recv2 = clientSocket.recv(1024)
print recv2
if recv2[:3] != '250':
print '250 reply not received from server.'
Using SSL:
clientSocketSSL = ssl.wrap_socket(clientSocket)
Then clientSocketSSL replaces all instances of clientSocket. The STARTTLS lines are also removed and import ssl is added to the top.
When using the first method, the MAIL FROM: command isn't returning anything. I'm getting the following output:
250 mx.google.com at your service
220 2.0.0 Ready to start TLS
250 reply not received from server.
When using SSL, I'm getting the same as the linked post:
ssl.SSLError: [Errno 1] _ssl.c:504: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol
Am I missing something here? I guess my best option is to use TLS but I have no idea how to go about that... is there something wrong with my MAIL FROM command?

When using SSL, you need to connect to port 465 instead of port 587. If you use STARTTLS, you still need to use ssl.wrap_socket, you just do it later - specifically, after receiving the 220 response to the STARTTLS command. After doing STARTTLS, you're supposed to do HELO again, since the server is supposed to forget anything that happened before the STARTTLS.
In either case, the servers at smtp.google.com ports 465 and 587 still won't return a 250 response to the MAIL command, since they require that you are authenticated before you send mail. You'll get a 530 response instead. You'll need to use the AUTH command with your gmail.com credentials to authenticate before you can use MAIL successfully on those servers.
If you don't want to authenticate, and depending on the details of what you need to do, you could try using port 25 of the server found in gmail.com's MX record. At the moment, the server is gmail-smtp-in.l.google.com and supports STARTTLS.

After STARTTLS, call
clientSocket = ssl.wrap_socket(clientSocket)

How to send mail in hotmail using Python?

Is there a way to login my hotmail account and send mails with a Python program?

You can try using their SMTP server:
User name: Your Windows Live ID, for example yourname#hotmail.com
Password: The password you usually use to sign in to Hotmail or Windows Live
SMTP server: smtp.live.com (Port 25) {Note: If port 25 has been blocked in your network or by your ISP, you can set SMTP port to 587 with TLS or SSL Encryption depending on the client in use}
Authentication required? Yes (this matches your POP username and password)
TLS/SSL required? Yes
Use smtplib to send mail. You can find some examples here.