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Old 03-13-2019, 03:57 PM
M8harry M8harry is offline Windows 7 64bit Office 2010
Join Date: Dec 2018
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Default Outlook 2016 wont send emails with attachments

Hi All.

I have a bit of an issue with Outlook and its a bit of an odd one. I have spent 4 hours with my ISP and they are have exhausted every avenue open to them.

I have outlook 2016 installed on a new Laptop (windows 10) and I use office 365 on my home pc. My personal email is configured on both (imap) and works fine on my home pc, on my laptop i can receive fine but sending is an issue.

If using my ISP's settings for outwards mail server if I try and send I get the error code 0x800CCC0F almost instantly. (port 465 and ssl encryption)

If I use Outlook default value port 25 and no encryption then I can send emails with out attachments ok.

IF i try and attach a file however it will fail! no matter the size of the attachment. from 300k to 5 mb it just sits in the outbox. The error code is 0x8004210B Time out waiting for a response. IF some do actually send the attachment will not open or is corrupted.

My work email is setup on this laptop and uses the same outlook 2016 and it works perfectly. On a side note I have run the recovery software reset the laptop and only put my home account on thinking the work one was clashing and its still the same results.

Mozilla Thunderbird will send emails with attachments from my personal email address faultlessly. It appears to be an issue with outlook 2016 and my personal email on my laptop.

ANY help on this would be greatly appreciated.
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