Emails Not Being Received

[HongKongphooey]

At work we have to use outlook 365 for emails and one company we have to email regulary says they are getting any of the emails we send. I know its the right email address because I sent them an email from my personal email account and they received it. This has been going on for a couple of months. They can email us no problem, before November 2017 they got our emails, but only if I sent them on a reply of one of their messages. My line manager is getting annoyed with me and thinks I m doing something wrong. All other emails are received to our companies we deal with, apart from another branch of this same company who say they havent got some of the emails I sent, but others they have got. I am starting to feel as if its all my fault, and Im going mad or something.
Incidently I do know that the lady I replaced set up our Company email address on outlook 365 but she made it so our company dont pay anything for it. Any help appreciated.

[davegosling]

Sounds like that they have, inadvertently no doubt, set up a rule which blocks emails from your domain, though a rule of higher priority allows replies to get through.

Contact their IT department.

[Quizproquo]

Do you have any embedded files, such as logos and such in the body of your emails?
These can sometimes be rejected by systems as possibly harmful.

[yogi-bear]

Hi HKF

Don't you have any company 'techies' who look after the computer glitches you all, at work, might experience, so they may be able to sort out the problem?....Or you could ring the lady you say set up the outlook 365 and ask her if she can help.

[HongKongphooey]

No we dont have any logo's on our emails quizproquo. I will tell my boss what dave has said. I can speak to the boss at the other company, they dont have an IT department, theres only 3 of them!