Email verify 6

import re
import dns.resolver
import socket
import smtplib
import csv

email_list = ['rbrt.jns90@gmail.com', 'bruno@xuzo.com']


##How to write to a CSV
#dict = [
#    {'emails': 'rbrt.jns90@gmail.com'},
#    {'emails': 'bruno@xuzo.com'},
#    {'emails': 'blah@foo.com'}
#    ]

#with open('emails.csv', 'w', newline='') as csvfile:
#    fieldnames = ['emails']
#    writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
#    writer.writeheader()
#    for row in dict:
#        writer.writerow(row)

write_list = []

with open('emails.csv', newline='') as csvfile:
    reader = csv.reader(csvfile, delimiter=',')
    next(reader) # Skip the firstline
    for row in reader:
        row = "".join(row)
        print(row)

        def matcher(row):
            addressToVerify = row
            match = re.match('^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$', addressToVerify)

            if match == None:
                return False
            if match:
                return True

        if matcher(row) == True: #<- the email from the row above goes here
            regexp = re.search("\@(.*)", row)
            domain = regexp.group(1)
            print("Domain: %s "% domain)
            records = dns.resolver.query(domain, 'MX')
            mxRecord = records[0].exchange
            mxRecord = str(mxRecord)
            # Get local server hostname
            host = socket.gethostname()

            # SMTP lib setup (use debug level for full output)
            server = smtplib.SMTP()
            server.set_debuglevel(0)

            # SMTP Conversation
            server.connect(mxRecord)
            server.helo(host)
            server.mail(row)
            code, message = server.rcpt(str(row))
            server.quit()
            # Assume 250 as Success
            if code == 250:
                print(">> %s"% row)
                print('%s == Success'% row)
                new = {'emails': row, 'successful': 'SUCCESSFUL'}
                write_list.append(new.copy())
                #writer.writerow(new)
            else:
                print('%s == Bad'% row)

                new = {'emails': row, 'successful': 'BAD'}
                write_list.append(new.copy())
        else:
            print("No Match")

with open('successful.csv', 'w', newline='') as successful:
    fieldnames = ['emails', 'successful']
    writer = csv.DictWriter(successful, fieldnames=fieldnames, quoting=csv.QUOTE_MINIMAL)
    writer.writeheader()
    writer.writerows(write_list)
    successful.close()