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General Email Client Configuration

General Client Configuration

You can use the following information to configure IMAP with many mail clients. If you encounter difficulties, we suggest contacting your mail client’s customer support department for further instructions.

Incoming Mail (IMAP)
Server – requires SSL:
Use SSL: Yes
Port: 993
Outgoing Mail (SMTP)
Server – requires SSL: (use authentication)
Use Authentication: Yes
Use SSL: Yes (some clients call this SSL)
Port: 465 (If your ISP blocks port 25, please use port 465)
Account Username: your full email address (
Email Address: your full email address (
Password: your password

Please note that if your client does not support SMTP authentication, you won’t be able to send mail through your client using our servers and your email address.

Related: Why can’t I connect on port 25?

8 Responses

  1. Hello,

    I’m a tech support rep at Cellcom. We only block port 25 on our network for the reasons listed in the related note above.

    I’ve tried entering one of your customer’s IMAP settings into his Android phone as listed above. The incoming settings are working fine, but the outgoing is not authenticating. Are you having any issues on your network at this time?

    I can call you with your customer if you are willing to work on this with me. I’m happy to help out if I can.

    Thanks for your time!

    Paul from Cellcom

  2. Paul on Jan. 26th, 2011 at 11:41 am
    • I would recommend using port 465 with SSL or port 587 with TLS. Most ISPs do not block this since authentication is typically required. Remember when using a username it is the complete email address. Please call the number above if you need additional help.

    • Jason Gegere on Jan. 26th, 2011 at 11:49 am
      • The settings above say to use 465 with SSL. That’s what we used to set up your customer’s email account in the phone, and it did not work. I’ve asked the customer to let you know that it isn’t working. The only port we block is 25, so there is no reason that the Cellcom network would be stopping your settings from working.

        If you can think of anything else, let me know.

        Thanks for your help! :-)

        Paul from Cellcom

      • Paul on Jan. 26th, 2011 at 11:58 am
      • Additional settings for a Android OS: Paul you need to allow the certificate on the device. Allow all certificates should be a drop down menu titled “Security Type”. The server address for outgoing mail is another outgoing port that is open is 587. Please give this a try.

      • Jason Gegere on Jan. 26th, 2011 at 12:04 pm
  3. Hi Jason,

    Thank you very much for your help with this. There are many ISPs that don’t understand we are trying to help their customers :-) You have been wonderful to work with!

    I’ll add a short note here, for others that might find this thread. Some of the Android phones being released do allow the acceptance of certificates in their native (program that comes installed on the phone) mail applications, while others do not. If users have a phone that doesn’t allow the acceptance of certificates, they will need to find an alternate email program in the Market application.

    Have a great day!

    Paul from Cellcom

  4. Paul on Jan. 31st, 2011 at 10:47 am
    • Paul, all Android phones should be able to accept third party certificates or any certificate in general. I understand that some phones do not do this and these phones should not be sold. I have several customers using the “HTC Desire” specifically and I worn them about security. Your email and password are sent as clear text because of limited SSL certificate support. I have shown this to customers, reading them back their password.

      I wish I could promote Cellcom locally, but I can’t based on these issues, and offerings.

    • Jason Gegere on Apr. 8th, 2011 at 10:02 am
  5. There is a way for certificates to be added to the Desire. Load them onto the SD card, then go to Menu > Settings > Security > and then down on the bottom of the screen it allows you to install encrypted certificates from SD card. There will also be a software update for this phone in the near future. It currently has 2.1 and will be upgrading to 2.2 which has more features and possibly a better internal email client.

    I believe back when I left that post on your site we were using the HTC Hero. Each phone is a little different.

    The nice thing about the android phones is that if you don’t like using the application that comes preinstalled, or if it doesn’t utilize the features you would like to use, you can go to the market and find an application that has the features that you are looking for. In this case you are looking for an email client that allows more security that you believe the Desire comes with preinstalled.

    Does that cover the information you were looking for?

    Thank you,
    Paul from Cellcom

  6. Paul Loehlein on Apr. 8th, 2011 at 12:06 pm
    • Paul this is helpful to me be not many people would know what to do. The Desire is a newer version of the Hero, both these models have this issue as it is increasing as more people are using these devices. I will research the loading of a SSL certificate to an SD card since this current OS build is lacking support.

    • Jason Gegere on Apr. 8th, 2011 at 12:12 pm

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