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MS Office Forum / Outlook / General MS Outlook Questions / March 2008Sending email error using Outlook on Comcast
One of employees has Comcast at home for his hi speed cable / internet and has a wireless router. He does not use the Comcast email account, but uses our "Covad" provided email. He can get on line, get emails on outlook but cannot send. Comcast on the phone said they could not help because I was using Outlook. It does not appear to be a Covad issue, beacuse it works fine everywhere else. I tried other laptos as well in his house and we cannot send either. Not sure what to do. What is the error message when the user tries to send? Please include the error message and/or number.  SignatureKathleen Orland - MVP Outlook Outlook Tips: http://www.outlook-tips.net/ http://www.howto-outlook.com/ > One of employees has Comcast at home for his hi speed cable / internet > and has a wireless router. He does not use the Comcast email account, [quoted text clipped - 5 lines] > > Not sure what to do. > One of employees has Comcast at home for his hi speed cable / internet > and has a wireless router. He does not use the Comcast email account, [quoted text clipped - 5 lines] > > Not sure what to do. He may have a port 25 block; happens to some Comcast users for various reasons. Does the Covad provided email allow SMTP message submission through port 587, or port 465? SignatureNorman ~Oh Lord, why have you come ~To Konnyu, with the Lion and the Drum i have had similar problems with outlook 2007. I use IMAP access to a Email account (not gmail or hotmail etc) and have been sending and receiving emails for the past 3 months with no problem. As of January 1st 2008 i can no long send mails. I am still receiving emails but keep getting the error 0x80042109. Says i can not connect to your outgoing SMTP email server. I checked to make sure that port 25 wasn't being blocked on my end but then again if it was i wouldn't be receiving emails either. On another note if i access this account through exchange outlook web access i can send emails out. I am also a comcast user. Thanks for any suggestions or help. > i have had similar problems with outlook 2007. I use IMAP access to a > Email account (not gmail or hotmail etc) and have been sending and [quoted text clipped - 4 lines] > being blocked on my end but then again if it was i wouldn't be > receiving emails either. Wrong. Port 25 has nothing to do with receiving email. By RFC 2821, port 25 is designated for "mail transfer". Most E-mail Service Providers initially also use it for message submission. However, because outbound 25 can be used with *any* SMTP server, not just message submission servers, spamming Trojans infecting HSI customer computers, can jam spam to gateway mail servers. As a consequence, more ISPs are blocking outbound port 25 access to their residential customers, and more ESPs are providing access either on RFC 2476 designated Message Submission port 587, or Cisco designated Message Submission port 465 (some, such as Gmail, offer both). Receiving email is done using port 110 (non-secure), port 995 (POP3 with SSL), or port 993 (IMAP with SSL). > On another note if i access this account through exchange outlook web access > i can send emails out. I am also a comcast user. Thanks for any suggestions > or help. Comcast uses a hardware device to detect SMTP activity on outbound port 25. If that exceeds a specific threshold, they push a port 25 block modem configuration file onto their customers' cable modems. I don't know what the file has (you should be able to view it in the modem GUI pages), but an easy test for a port 25 block is to try to Telnet into the Message Submission server on port 25. Looks like this: | C:\Documents and Settings\User>telnet smtp.comcast.net 25 | Connecting To smtp.comcast.net... [quoted text clipped - 3 lines] | | Connection to host lost. If you get this instead: | C:\Documents and Settings\User>telnet smtp.comcast.net 25 | Connecting To smtp.comcast.net... | Could not open connection to the host, on port 25: | Connect failed You have an outbound port 25 block on your cable modem. SignatureNorman ~Oh Lord, why have you come ~To Konnyu, with the Lion and the Drum > > i have had similar problems with outlook 2007. I use IMAP access to a > > Email account (not gmail or hotmail etc) and have been sending and [quoted text clipped - 50 lines] > ~Oh Lord, why have you come > ~To Konnyu, with the Lion and the Drum i tested the and got the connect failure on port 25. i further read on http://www.lockergnome.com/usrbingeek/2007/04/12/comcast-blocking-port-25/ about switching to port 587 etc for outgoing. But no such luck for my issues so far. thanks for the help so far. This is very frustrating for something that has been working fine for the past 3 months. > i tested the and got the connect failure on port 25. i further read on > http://www.lockergnome.com/usrbingeek/2007/04/12/comcast-blocking-port-25/ > about switching to port 587 etc for outgoing. But no such luck for my > issues so far. thanks for the help so far. This is very frustrating > for something that has been working fine for the past 3 months. Comcast also accepts connections to 'smtp.comcast.net' using port 465 with SSL. Might give that a try. SignatureNorman ~Oh Lord, why have you come ~To Konnyu, with the Lion and the Drum I have been struggling with this issue for over a month now...THANK YOU for the explanation...Fixed my problem in a snap. > > i have had similar problems with outlook 2007. I use IMAP access to a > > Email account (not gmail or hotmail etc) and have been sending and [quoted text clipped - 45 lines] > > You have an outbound port 25 block on your cable modem.
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