revised email verify

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()

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)
            try:
                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()
            except:
                pass
            finally:
                # 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())

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()