B Mail bulk mailing
Proven and reliable delivery from 350 consignments

Anchor Navigation

“B Mail bulk mailing” is the reliable shipping solution for letters and mailings with a volume of 350+. Delivery takes place on the sixth working day at the latest after posting (with the exception of Saturdays). B Mail bulk mailings are an ideal option for sending postcards, mailings, catalogues, invoices or correspondence – in short, any printed matter that is not time-critical. 

  • Delivered to the recipient within a maximum of 6 working days (Mon to Fri)1
  • From as few as 350 copies
  • Impeccable delivery quality at a low cost
  • Option of posting in all branches or in Swiss letter and logistics centers

Rich Content Section

Important information

Delivery within six working days (Mon to Fri) after posting (no Saturday delivery).

Posting Delivery
Monday By Tuesday of the following week
Tuesday By Wednesday of the following week
Wednesday By Thursday of the following week
Thursday By Friday of the following week
Friday By Monday of the next but one week
Saturday By Monday of the next but one week

Hand in your B Mail individual items at a branch before the usual close of business. For mail handed in after these times, the following day will be deemed to be the day of posting.

No special labelling is required. The postage paid impression service ensures uncomplicated franking of bulk mailings.

Find out more

Swiss Post assumes no liability.

Track & Trace is not possible – with the exception of pallets with sorted mailings (see “Track & Trace for pallets” for district or locality bundles).

Light perforations may be used, provided that they do not affect mechanized processing.

  • No protruding elements (such as Post-it notes or similar) can be attached.
  • Postcards may not have any folds.
  • Postcards may be laminated or coated on one side (but not on the address side).
  • The PP postmark is the only postmark that is considered a valid postage paid impression.

The weight of the paper depends on the paper format:

  • Up to A6 (148 x 105 mm) at least 120 g/m
  • A6/A5 (210 x 105 mm) at least 150 g/m2
  • A5 (210 x 148 mm) at least 170 g/m2 
  • B5 (250 x 176 mm) at least 200 g/m2

If the mailings do not conform to the format directives, a surcharge for special mailings will apply.

For large mailings, postage is a key budget consideration. However, it is possible to lower costs considerably by adding upstream services.

Please provide advance notice for B Mail bulk mailings of ten bulk containers, pallets or 30,000 consignments or more.


Bulk mailing in Switzerland
B Mail bulk mailing


Up to B5 (250 x 176 mm), max. 6 mm thick

1–20 g

Standard letter

Up to B5 (250 x 176 mm), max. 20 mm thick1

Basic price
1–100 g
per 20g
+ 0.01

Midi letter

Up to B5 (250 x 176 mm), max. 20 mm thick

Basic price
101–250 g
Surcharge (from 101 g) per 20 g
+ 0.01

Large letter up to 500 g

Up to B4 (353 x 250 cm), max. 20 mm thick

Basic price
1–500 g
per 20 g
+ 0.01

Large letter up to 1000 g

Up to B4 (353 x 250 cm), max. 20 mm thick

Basic price
501–1000 g
Surcharge (from 501 g) per 10 g
+ 0.01

All prices in CHF (incl. VAT)

Bulk mailings that need to be sorted manually are liable to be treated as special items and incur a surcharge.

1The surcharge for unsorted special items (e.g. with printing in the coding or franking area) is CHF 0.25 per consignment.

A format surcharge of CHF 1.50 per consignment is billed (including surcharge for special items) for standard and midi letters between 20 mm and 50 mm thick. Thicker consignments and large letters thicker than 20 mm are considered as parcels.

Value-added services

Price benefits on addressed letters

As a business customer with a billing relationship, correctly prepared letter volumes will see you benefit from price reductions and discounts. This is your reward for supporting efficient processing.

Bulk Mailing Manager
The software solution for the preliminary sorting of consignment volumes

Do you regularly mail addressed bulk mailings for your customers containing more than 3,000 copies with Swiss Post? With our Bulk Mailing Manager software, your customers save on postage while you spend less time preparing the mailings.

Maintaining addresses
Swiss Post’s address management service

With customer addresses, donor indexes and member lists that are always up to date, you can be sure that your consignments reach the correct recipient. This saves on unnecessary returns and avoids additional expenditure. Or would you like to pinpoint your potential for growth and need a solid basis for this? Swiss Post’s wide range of services supports you with your address management needs.

This might interest you too

A Mail
Delivery on the next working day

  • With the recipient the next working day
  • Saturday delivery
  • Indicates great appreciation
  • Attracts plenty of attention
Find out more

OnTime Mail
Specific-day delivery from 10,000 items

  • Specific-day delivery

  • Saturday delivery

  • Ideal for time-relevant or limited sales campaigns

  • For business customers with special conditions

Find out more

Expert Mail
Major print runs

  • Specific-day delivery
  • For major print runs of tens of thousands of items up to several hundred thousand items
  • Ideal for catalogues and other promotional mailings
  • For business customers with special conditions
Find out more

Rich Content Section

A balancing man against a green background is the logo for the “pro clima” – Shipment option.

“pro clima”-Shipment

The CO2 emissions for all Swiss Post mailing products will be offset at no extra charge for you.

Swiss Post is not only reducing CO2 – for example through its use of electric vehicles – it is also offsetting carbon emissions in its delivery of all PromoPost consignments by investing in high-quality climate protection projects.

More information can be found at www.swisspost.ch/climate.

Step by step