Can't add email to my mac mail account.

I recently started having problems with my mail account. I deleted the mail folder and started over and now can no longer add any email accounts besides my icloud account. When I try I get the following message.
Logging in to the optonline.net POP server “mail.optonline.net” failed. Make sure the user name and password you entered are correct, then click Continue. If the information isn’t correct, you cannot receive messages.
My mail accounts still work on my ipad and iphone with the exact same information. Something else I find strange, when I go to add a new account my old deleted account already appears in the email address section. Why would a deleted account, presumably one it should n't know anymore come up as a suggestion without me adding it? Does mail keep a copy of the account hidden somewhere else besides the plist and in the hidden library?
I am at wits end. I can think of any reason that I shouldn't be able to add the email when all the information is correct. I have also checked my computer for viruses and malware with several programs, the latest one being SOPHOS. Any suggestions?

Don't know what any of this means:
INITIATING CONNECTION Dec 17 21:40:48.848 -- host:mail.optonline.net -- port:110 -- socket:0x0 -- thread:0x7fc454d2d590
INITIATING CONNECTION Dec 17 21:40:48.849 -- host:mail.optonline.net -- port:110 -- socket:0x0 -- thread:0x7fc454cafd40
INITIATING CONNECTION Dec 17 21:40:48.851 -- host:mail.optonline.net -- port:10 -- socket:0x0 -- thread:0x7fc454c8b020
CONNECTED Dec 17 21:40:48.912 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc45388cc60 -- thread:0x7fc454d2d590
CONNECTED Dec 17 21:40:48.939 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc453c35c60 -- thread:0x7fc454cafd40
CONNECTED Dec 17 21:40:49.021 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:587 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
READ Dec 17 21:40:49.127 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc45388cc60 -- thread:0x7fc454d2d590
+OK Messaging Multiplexor (Sun Java(tm) System Messaging Server 6.2-8.04 (built Feb 28 2007))
READ Dec 17 21:40:49.159 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc453c35c60 -- thread:0x7fc454cafd40
+OK Messaging Multiplexor (Sun Java(tm) System Messaging Server 6.2-8.04 (built Feb 28 2007))
READ Dec 17 21:40:49.220 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:587 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
220 mta1.srv.hcvlny.cv.net -- Server ESMTP (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007))
WROTE Dec 17 21:40:49.278 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc45388cc60 -- thread:0x7fc454d2d590
CAPA
WROTE Dec 17 21:40:49.336 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc453c35c60 -- thread:0x7fc454cafd40
CAPA
WROTE Dec 17 21:40:49.368 [kCFStreamSocketSecurityLevelTLSv1SSLv3] -- host:imap.gmail.com -- port:993 -- socket:0x7fc455463110 -- thread:0x7fc454b6d290
1.250 CAPABILITY
WROTE Dec 17 21:40:49.416 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:587 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
EHLO [10.0.1.25]
READ Dec 17 21:40:49.458 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc45388cc60 -- thread:0x7fc454d2d590
+OK list follows
TOP
PIPELINING
UIDL
RESP-CODES
AUTH-RESP-CODE
USER
SASL PLAIN
IMPLEMENTATION MMP-6.2p8.04 Feb 28 2007
READ Dec 17 21:40:49.517 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:110 -- socket:0x7fc453c35c60 -- thread:0x7fc454cafd40
+OK list follows
TOP
PIPELINING
UIDL
RESP-CODES
AUTH-RESP-CODE
USER
SASL PLAIN
IMPLEMENTATION MMP-6.2p8.04 Feb 28 2007
READ Dec 17 21:40:49.578 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:587 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
250-mta1.srv.hcvlny.cv.net
250-8BITMIME
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-EXPN
250-HELP
250-XADR
250-XSTA
250-XCIR
250-XGEN
250-XLOOP C678AEFCBE1B202D96AB1985CBD4A774
250-AUTH PLAIN LOGIN
250-AUTH=LOGIN
250-NO-SOLICITING
250 SIZE 104857600
CONNECTED Dec 17 21:40:49.662 [kCFStreamSocketSecurityLevelTLSv1SSLv3] -- host:mail.optonline.net -- port:110 -- socket:0x7fc45388cc60 -- thread:0x7fc454d2d590
CONNECTED Dec 17 21:40:49.729 [kCFStreamSocketSecurityLevelTLSv1SSLv3] -- host:mail.optonline.net -- port:110 -- socket:0x7fc453c35c60 -- thread:0x7fc454cafd40
CONNECTED Dec 17 21:40:49.837 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:25 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
READ Dec 17 21:40:49.986 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:25 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
220 mta3.srv.hcvlny.cv.net -- Server ESMTP (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007))
WROTE Dec 17 21:40:50.120 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:25 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
EHLO [10.0.1.25]
READ Dec 17 21:40:50.210 [kCFStreamSocketSecurityLevelNone] -- host:mail.optonline.net -- port:25 -- socket:0x7fc455130430 -- thread:0x7fc454a2e540
250-mta3.srv.hcvlny.cv.net
250-8BITMIME
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-HELP
250-XLOOP 6E90941A9D3837DEDFC4281877FB0596
250-ETRN
250-NO-SOLICITING
250 SIZE 104857600

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