bounce error : message has lines too long for transport

Hello Ahmad Altaher,

Many thanks for sharing details via Private message. We have checked your details and seems your affected account is not belongs to Microsoft365 for business account and also you are Microsoft Office professional plus 2021 user. Since we are belongs from Microsoft365 for business community team, so to check this issue further, we will move this case to correct dedicated category, so support engineer team will check this issue and assist you further. At this point, your patience and kind co-operation will be highly appreciated.

Thank you so much for your precious time. Stay safe and healthy.

Regards,

Ankita Vaidya

Hello Ahmad Altaher,

Thank for providing update. To further check this issue, may I know have you check to send email from your web mail app, does it cause any issue? Further we have checked your details which you shared via Private message but seems we couldn’t found your Outlook’s Office account page screenshot. So request you to kindly provide it by open Outlook > file > Office account > share that entire page screenshot, so we can check your product and version details.

Other information we will send you via Private Message. kindly check it.

Regards,

Ankita Vaidya

Dear Ankita

thanks for your support,

but I tried this way before because I did googled it before and this method did not succeeded

i did send you a Private Message

Hello Ahmad Altaher,

Good day to you and hope you are doing well.

Regarding your issue, would like to confirm does the same issue occurs if you send email via web mail app? If you haven’t check with web mail app, kindly check from there. If web mail app side same issue, kindly provide us your web mail app link and if web mail app side has no issue, it means issue is with Outlook desktop app.

For Outlook desktop app, we found that when user sending email from Outlook desktop app and Outlook is not configured to correctly wrap the sentences within the email, this type of error occurs. Long lines can be hard to read in emails, as such it is considered proper email etiquette to break the lines of your messages to somewhere between 65 and 76 characters. When you wrap long lines of text, the Outlook email client automatically breaks sentences away from the current line to start on a new line. This shortens the length of all outgoing emails and is similar to narrowing the margins of the writing space. So given this situation, we also recommend to kindly check your settings and set accordingly to see if it makes any difference.

To do so : Open Outlook > go to File > select Options > go to Mail > under Message format > check for Automatically wrap text as character settings and set between 60 to 76 > click Ok to save changes > restart Outlook.

Screenshot for your reference:

If still facing the same issue, request you to kindly provide us this entire bounce back message and your Outlook Office account page screenshot via open Outlook > File > Office Account via Private Message only, so based on it we will further check from our side and assist you. At this point, your kind understanding and co-operation will be highly appreciated.

Thank you so much for your precious time. Stay safe and healthy.

Regards,

Ankita Vaidya